When you want to find hydroponics kit, you may need to consider between many choices. Finding the best hydroponics kit is not an easy task. In this post, we create a very short list about top 15 the best hydroponics kit for you. You can check detail product features, product specifications and also our voting for each product. Let’s start with following top 15 hydroponics kit:
Reviews
1. DreamJoy Hydroponic Grow Kit 72 Site 8 Pipe NFT PVC Hydroponic Pipe Home Balcony Garden Grow Kit Hydroponic Soilless Plant Growing Systems Vegetable Planting Grow Kit (72Site 8Pipe)
Feature
Material: Food grade PVC-U; Pipe diameter: 2.5"(6.3cm); Hole diameter: 1.26"(3.2cm); Spacing between the holes: 3"(8cm); Hole quantity: 72.Growing plants in hydroponics requires less water, less space, and pests and diseases are more easily controlled and prevented.
This hydroponic indoor or outdoor grow system is designed for fast, maximum-convenience vegetable gardening. Perfect for beginners! No experience needed.
The system produces high-quality vegetables, herbs, melons, and berries--45-day yields!--that are more nutritious and better-tasting than soil-gardened produce because oxygenated water and nutrients are delivered directly to the roots.
Package included: 1 X Holder and 8 Main Pipes; 72 X Planting Sites; 1 X 110V Water Pump; 1 X Planting Sponge; 1 X 5.25ft Hose
Description
Hydroponic Grow Kit 72 Sites 8 Pipes Hydroponic Planting Equipment Ebb and Flow Deep Water Culture Balcony Garden System Vegetable Tool Grow KitThis hybrid model can be Ebb and Flow type when using a time controller or a Recirculating Deep Water Culture type without using time controller.
Feature
Food-grade material, safe and green, with all fittings
Easy assembled, convenient, space-saving and time-saving
Advanced inner blocking design
Inner stopper all uses food grade material for the water balance on every lay
Specifications
Material: PVC-U
Pipe quantity: 8
Pipe diameter: 2.5"(6.3cm)
Hole quantity: 72
Hole diameter: 1.26"(3.2cm)
Spacing between the holes: 3"(8cm)
Planting Process:
Seed - put the seed into the sponge, and wait for sprout;
Sprout - leaf eating vegetables will need 3-10 days to sprout, Fruit eating will need longer;
Transplant - when it grows in certain period, it needs to be transplanted holed with sponge together;
Planting
Grow - after 30-60 days, man can harvest;
Harvest
NOTE:
You may need to prepare one reservoir tank. Non-transparent tank and with cover is better. The capacity is best 15-20L
You need to bring your own power strip.
Because of the big volume after the installation, for the convenient transport,we didn't install it. You need to install by yourself. This will expend a little effort.
It takes up approx. 0.4 square meters, the place must be under enough sunshine, at least up to 4 hours every day. If there is no enough sunshine, it will result in the vegetables malnutrition.
2. SimLife LED Plant Grow Light Kit Indoor Herb Garden Desktop USB Grow Lamp Auto Mode for Plants Hydroponics Greenhouse Office (White)
Feature
LED Light - The smart planter can provide lighting similar to sunlight which plants need for photosynthesis. This allows the planter to be placed in areas of a room where sunlight cannot reach and substitute sunlight with a more direct and useful light source than conventional indoor lightingAuto Mode - The lighting system can be sent to Auto Mode. This allows the planter to turn off its lights to save energy during night time or when the user is not present
Removable Soil Container and Water Tank - This removable soil container allows its user to easily plant plants or change plants. The water tank is designed to help carry water to the plant, provides plants with water
DC and USB Power Jack - The smart planter support all USB port power supply, readily available, low-power operation. It also accepts DC 4.5V adapter
Used everywhere - This smart planter is perfect for bedroom, kitchen, office, garden, greenhouse. It can provide the comfortable and romantic environment. It must be a good gift for yourseldf, friends, family, lover etc
Description
Your Mini Indoor Garden!Love gardening but your space is limited? Get yourself this smart planter by Simlife and grow your own plants from now on. Ideal for indoor use, either on the kitchen counter, window or living room. Grow your favorite herbs all year long without worrying about weather conditions.
?LED lighting?The smart planter equipped with professional full spectrum plant LED grow lights, which integrates optimal wavelength and intensity, that provide lighting similar to sunlight which plants need for photosynthesis.
?Three system settings?The LED lighting system has 3 settings, ON, AUTO, and OFF. When ON mode is selected the LED lights will stay on. When set to AUTO mode, the LED lights will come on when the smart planter senses sufficient amount of direct or indirect surrounding light. The light sensor is located at the front of the smart planter. When OFF mode is selected the LED lights will stay off.
?Removable soil container and Mini watering pot?The smart planter has removable soil container can make you plant all kinds of plants easily, besides, you can use the mini watering pot resease water into the soil.
?DC and USB power jack?The smart planter can be powered by an adapter or via USB cable.
Specification:
Power: USB or DC power
Size: 7.1*2.4*8.9 in
Color: white
Plastic Type: ABS
Accesories: USB power jack/DC power jack/Watering pot
3. KVMV Indoor Hydroponics Grower Kit DIY Self Watering Hydroponics Tools Plant Cloner Kit Hydroponic System Planting Container Include Aquarium Air Pump Buoy Planting Box etc
Feature
The hydroponics grower grow up to 11 plants once and is great beneficial for growing your grow herbs, Lettuce,fruits,flowers and vegetables, salad greens etc with eco-friendly material.Hydroponics Grower Kit grows plants 3-5 times faster than soil grown plants and plants can be harvest after 4-8 weeks according to climate and diverse vegetable types.
The box and planting basket are made by injection process and the raw material is made of PP material which passes the RoHS test.The buoy help to detect the nutrient solution level to warn you to add some solution or water conveniently
Can be used indoor or outdoor with Waterproof Grow Lights to accelerate the growth of plants. Just grow your lovely plants conveniently. No dirty soil any more.
Suitable for balcony use,office use,garden use,market use,parterre use,hotel use
Description
Specification:
Model105
Color:gray
MaterialPlastic
Voltage100-120V/50Hz
Pressure0.018mpa
Size41x24x14cm
PlugUS Plug
CAP:1.8L/min
Pump Waterproof LevelIPx4
Package included:
1 x Box(seeds not included)
1 x Buoy Deck
1 x Buoy
11 x Planting Baskets
11 x Planting Sponges
1 x Pump
1 x Check Valve
One set x Silicone Hose 10+90CM
1 x Bubble stone
1 x Tweezers
4. Amagabeli 4x4 Hydroponic Grow Tent for Indoor Plant Growing 48"x48"x80" with Removable Floor Tray Reflective Mylar Adjustable Rope Hangers Observation Window Tool Bag Room Box 4 by 4 Indoors Gardening
Feature
Indoor Plants Growing: 48"x48"x80" grow tent for indoor plant growing in a small apartment or house. Great enclosure allows proper light, humidity and temperature for sprouting seedlings, sexing plants and flowering. Perfect for tomato plants, pepper, cilantro, vegetable lettuce, cigarettes smell plant, herbal cannabis, medical marijuana or cannabis, herbs.Light Proof: 98% reflective Mylar interior lining, tear-proof 600D double stitched grow tent room kit blocks all light from escaping, HID lighting, HPS grow light and MH bulbs, no light leakage by the circular openings with double drawstrings or by observation window with light-tight seal.
Ventilation: All vent holes are circular double sleeved. Ventilation openings are to handle cables and for air circulation by exhaust fan, ducting hose, carbon filter, ballast and reflector. Better allows proper light, heat and air flow for seed germination and flowering period in indoor gardening horticulture.
Easy to Setup: Ergonomic and Easy to assemble. No tools needed, just make sure all the rubber feet are going the same direction. The hydroponic growing room is also easy to dissemble for clean-up or relocation. Extra canvas floor tray holds water for 3 days as a test with no leaks.
An Upgraded Version & Warranty: 2-year warranty! Return or refund can be negotiated it if your expectations are not exceeded. NOTE: Carbon filter, grow light and aluminum duct are for demonstration purpose only, not included. Accessories Included: 1 removable floor tray, 2 adjustable rope hangers and tool bag on the internal face. PLEASE BE NOTED THAT: This is an upgraded version. Compared with the former version, 2 adjustable rope hangers, tool bag and observation window are added.
Description
grow tent5. General Hydroponics pH Control Kit
Feature
Designed to work superbly in hydroponic environments, both soil-less mixtures and soil grown plantsIncludes pH Test Indicator tube:fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator, and observe the coloration of the liquid in the vial.
Includes 8oz bottle of pH Up which is used to elevate it to the desired level
Contains 8oz bottle of pH down which uses food grade phosphoric acid to lower the pH to to the desired level
For best results, discard and replace hydroponic solution regularly
Description
The pH Control Kit by General Hydroponics provides everything you need for testing the pH level of the nutrient solution in your hydroponic system. The pH balance is essential for stimulating vigorous plant growth. Vital elements in nutrient solution having pH that is too high (basic) or too low (acidic) cannot be properly absorbed by plants. Incorrect nutrient solution pH can cause slow growth, sickly plants and low yields. The kit contains pH UP (potassium hydroxide), pH DOWN (phosphoric acid), pH Test Indicator, and a test vial. To test, fill the vial halfway with nutrient solution, add 3 drops of pH Test Indicator per 5 mL of solution, and observe the coloration of the liquid in the test vial. Using either pH UP or pH DOWN, adjust the nutrient solution in your reservoir by adding small amounts of UP or DOWN with frequent re-testing to achieve the desired pH range (typically 5.5 to 6.5 for hydroponics).6. Hydrofarm GCSB Salad Box Hydroponic Salad Garden Kit
Feature
Passive hydroponic garden kitNo pumps or other electronic components
Comes with: Reservoir Tray, Top Plate Lid, op-off Bottle with Cap, 8 Net Cups, 8 Root Wraps, Grow More Hydroponic Nutrients - 50g, 6 Drain Plugs
Easy to get started
1 Year Warranty
Description
The Salad Box from Hydrofarm is ideal for growing a small soil-free garden of salad greens and other plants indoors or outdoors with almost zero maintenance. It is a passive hydroponics system based on the research of academic horticulturist B.A. Kratky.Using the Salad Box is clean and easy. It uses no electricity at allno air pumps or water pumps needed! It grows greens and lettuce up to thirty percent faster than soil. Use it indoors with grow lights or outdoors in natural light.
Simply mix the powder nutrient with water and pour into the reservoir, then wrap the root ball of each of your seedlings with the included;Root Wraps.; Place each wrapped seedling into a net pot, and you're set!
The Salad Box will provide you and your family with fresh greens without any of the hassles of larger gardens or systems. Only minimal assembly is required. The system includes one reservoir tray, one top plate lid with eight plant sites, one top-off bottle with cap, eight net cups, eight Root Wraps, one fifty-gram packet of general purpose nutrient, six drain plugs, and one instructions booklet.
The Salad Box fits perfectly under two-foot fluorescent light systems like the Jump Start T-five modular and T-twelve fluorescent fixtures.
7. Educational Insights Hydroponics Lab
Feature
View the entire plant, from roots to leaves, throughout the growth process, with this no-soil hydroponics set!Includes 3 shatterproof plastic tubes in stands with support rods and seed baskets and an activity guide.
No soil required! Roots are naturally magnified as they are viewed growing in water.
Appropriate for ages 5 and up.
Description
Get a 360 view of growing plants from the roots up! Ideal for science fair projects and at-home fun, this set of 3 transparent tubes is a no-soil, mess-free way to explore hydroponics with water or any other media. Includes 3 test tubes in stands with support rods, seed baskets, and activity guide. Durable, shatterproof plastic tubes measure 1.75" in diameter x 7"H each. Stands each measure 3.5"D x 3.25"W x 2.75"H and have a write-on/wipe-off surface. Ages 5+.8. Hydrofarm Net Cup, 3-Inch, 12-Pack
Feature
Use to promote healthy roots with even drainageThese baskets work with any kind of media -- hydroponics or soil-based
Allows for bigger, healthier roots and easier to clean
Comfortably-sized lip along the top of these containers, making them easy to grab, lift and transport
Each bag contains 12 pots
Description
These bucket baskets promote healthy roots with even drainage. Letting the roots grow their own way, right down through the pot, allows for bigger, healthier roots. These baskets work with any kind of media -- hydroponics or soil-based. They're also easier to clean, since water runs right through the holes. If you've ever experienced hand cramp or fatigue, let our bucket baskets come to the rescue. You'll notice comfortably-sized lip along the top of these containers, making them easy to grab, lift and transport. Check out our full collection of these net cups, bucket baskets and other containers to round out your garden supplies.9. General Hydroponics General Organics Go Box
Feature
General Organics provides gardeners with a complete line of premium biological plant foods and supplementsWe combine the time-tested ingredients of traditional agriculture with sustainable and efficient methods of modern cultivation
General Organics now has the GO Box starter kit
Description
General Organics provides gardeners with a complete line of premium biological plant foods and supplements. We combine the time-tested ingredients of traditional agriculture with sustainable and efficient methods of modern cultivation. General Organics now has the GO Box starter kit. The GO Box contains 16 oz. BioThrive Grow and Bloom fertilizers, as well as 8 oz. samples of every GO liquid supplement.10. Deep Water Culture (DWC) Hydroponic Bucket Kit 5 Gallon, 6 inch
Feature
Easy to use inexpensive complete kit - Deep Water Culture Hydroponic System by PowerGrow SystemsIncludes 5 Gallon FDA Approved Bucket + 6 inch Basket Lid
Also includes 44 GPH Air Pump, Air Tubing, Air Stone, Growing Medium, and Rockwool Seeds Starting Plugs
Features visible blue Water Level Indicator and Bucket Drain
1 Year USA Manufacturers Warranty on all Deep Water Culture Systems!
Description
Looking for an inexpensive and easy way to grow hydroponically? The PowerGrow Systems Deep Water Culture System is the answer! Super easy to use, the DWC system allows you to get up and growing in no time, with very little effort. The PowerGrow Deep Water Culture System includes everything you need for a complete system. In a Deep Water Culture system, the plant roots are immersed in an oxygen infused and nutrient rich water reservoir (a 5 gallon FDA approved bucket). The oxygen rich solution helps build healthy root systems faster and more efficiently than soil which results in superior plant growth and production. The PowerGrow Deep Water Culture System includes the following: 5 Gallon FDA Approved Bucket, 6" Net Pot Bucket Lid, Growing Medium, 44 gph Air Pump, Air Tubing, Air Stone, 3 Grodan Rockwool Starter Plugs, Blue Water Level Indicator + Drain, Complete Instructions, 1 Year Warranty. (Nutrients and pH test Kit not included) With the PowerGrow brand, you also get the quality assurance of a 1 year Manufacturers USA warranty. So what are you waiting for? Get growing with a PowerGrow DWC Deep Water Culture System today!11. Hydroponics Grower Kit, PATHONOR 11 Pods 3.5 Gal Self Watering DIY Planting Cloner Kit Educational Hydroponics System for Transplant, Cloning, Propagation, and Hydroponic Experiment Indoor Outdoor
Feature
1. Thick Quality Hydroponics Grower grows your plants ( fresh herbs, vegetables, salad greens, flowers, fruits) transplant your cuttings fast and easily with eco-friendly materials. Grow more plants, up to 11 once with 11-pod.2. Hydroponics Grower Kit grows plants 3-5 times faster than soil planting (effect by type of plant and solutions) for waterproof chug pumps the air into the basin to provide the perfect amount of moisture and oxygen needed. (Just flip the blue stop (valve) around if it cannot pump)
3. Considerate Design: The cloner kit basin is made from opaque material, preventing light from entering the basic to reduce the growth of green alga. The buoy is used to show the nutrient solution level to remind you to add some solution or water conveniently.
4.The Hydroponics System are perfect for indoor gardening , with Pathonor Waterproof Grow Lights to accelerate the growth of plants avoiding any bad weather outdoor.
5. This Hydroponics kit includes all parts needed for successful hydroponic growing. Great for garden transplant, hydroponics planting, cloning, propagation, agricultural experiment and Horticulture Education indoor, outdoor, home, in greenhouse, kichen and laboratory!
Description
Warranty:1-Year-Replacement-or-Money-Back-Guarantee. (Just click the Pousrewus and ask a question to tell us. We try our best to serve our dear customers!)
Advantages:
1.Just enjoy gardening indoor avoiding any bad weather, like rain, snow, cold, storm and hurricanenot outdoor with Pathonor Grow Lights to promote the growth even faster. Also It can be used outdoors like soil pot with waterproof pump to speed up growing.
2.Grow More Plant: Grow up to 11 plants once, more than others with just 6 pods.
3. 3-5 Times Faster Growing: Air pump pumps air into basin to provide more amount of moisture and oxygen than soil growing.
4.Cost-effective: It's made from eligible, ecofriendly and durable materials with reusable and easy usage. Easy to be used without any redundancy function.
5.Considerate Design: a. Shows solution level conveniently with a buoy inserted into the bigger hole Don't need to open the lid.(ensure the red part over the basin surface). b. Reduce the growth of algae by adopting non-transparent material and sealed design preventing light from entering.
Note:
1. The pump: A. The side of blue valve written with OUT should be linked the pipe connecting the air pump. If the pump can't work, please just flip it around so it will pump air. B. Place the waterproof pump in a cool place for a long working time.
2. Replace the solution and wash the roots after 10 days (the higher temperature, shorter time) to keep you love plants healthily.
Specification:
Model: 513760
Color: Gray
Material: Plastic
Size: 3 gal/41.3x27.6x14 cm
Voltage: 100-120V / 50Hz
Pressure: 0.018mpa
CAP: 1.8L/min
Pump Waterproof Level: IPX4
Package:
1 x Box(seeds not included)
1 x Pump
11 x Planting Baskets
11 x Planting Sponges
1 x Buoy
1 x Buoy Fixity
1 x Tweezers
1 x Silicone Hose
12. Educational Insights Nancy B's Science Club Way to Grow Hydroponics Kit & Gardening Diary
Feature
Observe, measure, cultivate, and stimulate an interest in biology and botany!Includes 2 seed baskets, 2 flasks with thermometers, and 2 trellises with rulers.
Includes 22-page activity journal packed with experiments, fun facts, creative writing prompts, and more!
Gardening Diary includes hydroponics experiments and history, including information about the Aztecs' amazing floating gardens!
Supports STEM learning.
Description
Sprout seeds, put them in the seed baskets, place seed baskets in the water-filled flasks, and watch your plants climb the trellis as they grow! This set includes everything kids need to explore the amazing world of hydroponics, including 2 seed baskets, 2 flasks with thermometers, and 2 trellises with rulers. And the included, 22-page journal is packed with experiments, fun facts, creative writing prompts, and more! Stimulate an interest in biology and botany with this Nancy B's Science Club set! Perfect for science fair projects and STEM learning.13. Hydroponic Site Grow Kit 90 Holes Water Culture Garden Plant System
Feature
The system produces high-quality vegetables, herbs, melons, and berries--45-day yields!--that are more nutritious and better-tasting than soil-gardened produce because oxygenated water and nutrients are delivered directly to the roots. And all the water pipes are food grade materials, no pollution.Extremely simple to assemble and use, this hydroponic indoor or outdoor grow system is designed for fast, maximum-convenience vegetable gardening. Perfect for beginners! No experience needed.
This hybrid model can be Ebb and Flow type when using a time controller or a Recirculating Deep Water Culture type without using time controller.
You may need to prepare one reservoirtank. Non-transparent tank and with cover is better. The capicity is best 15-20L And you need to bring your own power strip.
The place must be under enough sunshine, at least up to 4 hours every day. If there is no enough sunshine, it will result in the vegetables malnutrition.
Description
Attention:
You may need to prepare one reservoirtank. Non-transparent tank and with cover is better. The capicity is best 15-20L And you need to bring your own power strip.
Because of the big volume after the insallation, for the convenient transport,we didn't install it. You need to install by yourself. This will expend a little effort.
The teflon tape is the spare item, in order to prevent leakage of pipeline interface.
The place must be under enough sunshine, at least up to 4 hours every day. If there is no enough sunshine, it will result in the vegetables malnutrition. Features:
1.Standards:Three rows of three layers with 90 plant site
2.Package measures approximately 35" x 13" x 9"
3.Perfect connection of holder and pipe
4.Advanced inner blocking design
5.Inner stopper all uses food grade material for the water balance on every lay
6.S style flow
Item Included:(141095)
1*Holder and main pipe
90*Planting site
Gift:
1*110V deep well pump
120*Planting sponge
1* 4ft hose
14. DWC Hydroponics Growing System Kit - 2 Large Airstone, 14 Plant Sites (holes) Bucket w/ Air Pump - Best Indoor Herb Garden for Cilantro, Mint - Complete Hydroponic Setup Grow Fast at Home by SavvyGrow
Feature
SATISFIES BIG PLANT HUNGER... Extra large DWC bucket reservoir to feed big roots, and TWO large Airstones to fully oxygenate them, unlike the single tiny Airstone supplied by others3-5 TIMES FASTER THAN SOIL...our hydroponic growing kit creates big plants, fast; their roots get full nourishment without searching soil for it. The perfect indoor herb garden kit
FRESH & GOOD FOR YA... get full-power health benefits from your homegrown food; it keeps its vitamins, tastes better & unlike shop veg, hasn't travelled far. Go organic & show folks the way!
BRING THE GARDEN INDOORS...avoid bad weather, acid rich soils, & pests by growing healthy fresh herbs, salads, veggies, flowers & fruits inside. Ideal for lovers of organic food
BIG RESERVOIR MEANS BIG PLANTS... grow 6 together from seeds or seedling; place basil by tomato, lettuce with paprika, then add water & root supplement, now watch them grow!
Description
Ever wanted fresh herbs & salads but you don't have a garden, or your soil is too poor? The SavvyGrowDWC Hydroponic System lets you do it indoors. Click ADD TO CART now to grow big plants, fast n easy.
DON'T TOIL WITH SOIL...GROW BIG & FAST
Soil-based plants spread out vast root systems to hunt for nutrients, however our hydroponic growing kit
means plants don't need to search for food, since it is right below them, in the most absorbable form
possible. Our 2 x large airstones & pump, oxygenate water so plants will never be overwatered.
Here's more about this amazing system:
- Avoids bad weather
- Perfect for beginners
- Easy to grow organically
- Includes durable air pump
- Tube & bucket drain system
- Low maintenance gardening
- No worries about soil quality
- Big DWC reservoir to keep plants fed
- Slugs and pests are a thing of the past
- Grow veg without a glasshouse or garden
- 2 x large airstones (most offer only 1 small stone)
- Herbs, salads, veggies, flowers & fruits, fresh to your plate
WHAT DOES THE KIT INCLUDE?
The SavvyGrow hydroponic system comes with everything you need to become a home grower! It is the
perfect indoor herb garden kit, and makes a great gift for lovers of organic food and those wanting to enjoy
fresh, nutrient-rich food. Some plants may prefer overhead lighting, and these can be bought separately on
Amazon.
CAN YOU START PLANTS FROM SEED?
Yes, this is one of the best hydroponic systems for growing from seed, as there is plenty of space between
the sites (holes) to allow the plant to flourish as it would naturally.
Buy with confidence as you're covered by our 100% Money Back "Blooming Big" Guarantee, no questions
asked. Click Add to Cart now to grow big plants, fast n easy.
15. Aunifun Hydroponics Grower Kit DIY Self Watering Indoor Hydroponics Tools DWC Hydroponic System Planting Container Include Aquarium Air Pump Buoy Planting Box
Feature
Color: Gray & Material: Plastic & Size: 28x19x13.5cmPackage included:1 x Box &1 x Buoy & 6 x Planting Baskets &6 x Planting Sponges & 1 x Tweezers
The appearance is elegant, is conducive to the growth of a variety of plant operations and plant.
The roots are suspended in the reservoir beneath the net pots. The roots bathe in nutrient-rich solution throughout the entire grow cycle; which increases yield and reduces grow time.
The basin cover and the planting basket adopt the dark material, which can effectively prevent the light from entering the basin, thereby reducing the growth of green algae in the nutrient solution.
Description
Specification:Name: Hydroponic Grow Kit
Color: Gray
Material: Plastic
Size: 28x19x13.5cm
Package included:
1 x Box(The seed not included)
1 x Buoy
6 x Planting Baskets
6 x Planting Sponges
1 x Tweezers
Features:
1.The appearance is elegant, is conducive to the growth of a variety of plant operations and plant.
2.The basin cover and the planting basket adopt the dark material, which can effectively prevent the light from entering the basin, thereby reducing the growth of green algae in the nutrient solution.
3.On each side of the basin cover a chug cylinder, the role is as follows:
1)can be used as air bubble stone tracheal passage will pump the trachea from here into the basin;
2)Can be inserted into a hollow cylindrical hole from the chug of a plastic rod (i.e. buoy) as the nutrient solution level.