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The Leader In Recirculating Deep Water Culture | Hydra Unlimited

Free Shipping On All System Orders In The Continental U.S.A.!

HA-226-sponge grow-cones for Hydra Tower

Sponge Grow Cones (18 Pack)

SKU: HA-226 Category: Parts & Fittings Brand:

This is an 18-pack of cones. Our grow sponges are made of natural peat, which is very suitable to help germination; Compared with traditional growing soil, these do not contain harmful elements such as small pests or bacteria. These help promote a clean and healthy root development environment.

  • Industry-Leading Grow Technology
  • Faster Grow Times & Superior Aeration
  • U.S.A. Manufactured, Designed, Supported
  • FREE SHIPPING on all systems in the Continental U.S.A.

$4.99

Estimated delivery by 09/22/2026

Important Shipping Notice: Expedited shipping only applies to parts and fittings. All HydraMax Professional #4-32 bucket systems ship in 7 days or less.

Description

Our grow sponges are made of natural peat, which is very suitable to help germination; Compared with traditional growing soil, these do not contain harmful elements such as small pests or bacteria. These help promote a clean and healthy root development environment.

The end of the plugs features a small hole which allow you to place your seeds into them to make sure the seeds won't fall off into the water.

These provide an ideal growing medium for traditional greenhouse growers and hydroponic growers; Suitable for cultivating various types of shoots, such as vegetables, houseplants, herbs, succulents, wheat grass, flowers and ornamental plants, etc.

Additional information

Weight .1 lbs

What Growers Have To Say

"..My first try at DWC and I'm very happy to say the least! You guys make an amazing product, between my Hydra system, the Flora Flex wet nutrients, and LED – it's a winning combo no doubt!"
Matthew F. | Verified Customer
"These are a great product...reusable, durable and we have noticed quicker downwards root development. We are using 15-20% reduction in water levels= less nutrients and less water cost. They are more plant/user friendly. We expect a 70 to 80% savings on net pots as well."
Charlie C. | Verified Customer
"..We have had improvements in plant quality, efficiency in energy and nutrient costs. The system balances in minutes (we have our time down to 6 minutes with a 300 gal rdwc system).."
Charlie C. | Verified Customer
"My favorite thing about these netpots is how they spin! Making trimming a breeze for the hard to reach spots! Thanks for an awesome product!"
J. Smith | Verified Customer
"Nothing I've ever grown in ,will give growth as rapid as the Hydra Unlimited RDWC"
@wizardofOzGrows
"Hydra Unlimited is the best company I've ever worked with hands down. Systems are the best design on the market for faster growth, easy use and you get the best results. Customer service is top notch ..always there whenever I need them!"
@medicatedofKannabis
I can honestly say this system has proven to be one of the simplistic ways to grow in DWC, in this case, The Hydra Unlimited system is RDWC."
@QualityControlCannaCo
"Love working with a stand up company that stays connected and involved throughout your grows."
@lahomaleeFarms
"Nothing comes close to this system's performance."
Dario Baric | Experienced DWC Grower
"Roots healthy as f**k thanks to Hydra Unlimited and Current Culture H2O Nutrients. I have used nothing else with the hydra buckets. If you want the most healthy roots you gotta check out Hydra Unlimited."
MoBuds | Verified Customer
"My plants in HydraMax are huge!!"
Paul R. | Verified Customer
"It's such an easy and rewarding way to grow. I've been growing in my basement since 2018, and I've only grown this way."
Larry C. | Verified Customer
"My favorite thing about these netpots is how they spin! Making trimming a breeze for the hard to reach spots! Thanks for an awesome product!"
J. Smith | Verified Customer
"It has many more benefits which comes along with. Accelerated root growth, especially during the rooting phase. Increased stability through pH and EC management and healthier roots in general 😎👌🏼"
SKX RDWC | Verified Customer
"Root Halot: Medialess is the way to go, I swear by these!"
Root42Farms | Verified Customer
"Root Halo: ❤️❤️❤️the only way I grow!!🔥🔥🔥!"
L. Corbin | Verified Customer
"With HydraMax Systems, the root health is impeccable! You can physically see how the roots are thriving and happy."
Love Supreme Cannabis | Owner
"Working with Hydra Unlimited was the best decision that we made as a business. We gained so much knowledge when entering the industry."
Love Supreme Cannabis | Lead-Grower

Explore our Community

Every expert grower was a first-time grower once. 🌱

There`s nothing better than seeing someone harvest their first successful crop with the Hydra Tower. With simple setup, advanced hydroponic technology, and an easy growing process, it`s designed to help anyone grow with confidence from day one.

Welcome to the Hydra Unlimited family. Here`s to your first harvest and many more to come!

#HydraUnlimited #HydraTower #FirstTimeGrower #Hydroponics #VerticalGardening

1 1
Open post by hydra_unlimited with ID 17887405413615799
Every expert grower was a first-time grower once. 🌱 There's nothing better than seeing someone harvest their first successful crop with the Hydra Tower. With simple setup, advanced hydroponic technology, and an easy growing process, it's designed to help anyone grow with confidence from day one. Welcome to the Hydra Unlimited family. Here's to your first harvest and many more to come! #HydraUnlimited #HydraTower #FirstTimeGrower #Hydroponics #VerticalGardening
1 1

🇺🇸 Happy Labor Day from Hydra Unlimited!

Today, we're celebrating the hardworking people who make everything we do possible. We're proud to have a team that brings dedication, skill, and care to work every day.

At Hydra Unlimited, taking care of our people is just as important as taking care of our customers.

Thank you to our incredible team for all that you do. Happy Labor Day! 🇺🇸

3 0
Open post by hydra_unlimited with ID 18107317019180426
🇺🇸 Happy Labor Day from Hydra Unlimited! Today, we're celebrating the hardworking people who make everything we do possible. We're proud to have a team that brings dedication, skill, and care to work every day. At Hydra Unlimited, taking care of our people is just as important as taking care of our customers. Thank you to our incredible team for all that you do. Happy Labor Day! 🇺🇸
3 0

🔥 From a first time Hydra Tower grower trying Tabasco plants, Tim: "This is week 8. This thing is growing so huge, I`m hoping to move into blooming so I decreased the Flora-grow and increased the Flora-bloom. I also topped the main shoots and then topped some of the side shoots!"

Thanks for the update, looks amazing!

#hydraunlimited #growithhydra #indoorhydroponics #gardening

8 1
Open post by hydra_unlimited with ID 17982444122880825
🔥 From a first time Hydra Tower grower trying Tabasco plants, Tim: "This is week 8. This thing is growing so huge, I'm hoping to move into blooming so I decreased the Flora-grow and increased the Flora-bloom. I also topped the main shoots and then topped some of the side shoots!" Thanks for the update, looks amazing! #hydraunlimited #growithhydra #indoorhydroponics #gardening
8 1

💚 Huge thanks to one of our favorite growers, Emily, for the kind words!

Nothing means more to us than seeing our community succeed and hearing how the Hydra Tower is helping growers harvest fresh food at home, in their office, and everywhere in between. Thank you for being part of the Hydra Unlimited family and for sharing your experience with us!

Happy growing! 🌱

#HydraUnlimited #HydraTower #GrowTogether #Hydroponics #CustomerReview #VerticalGardening #GrowYourOwnFood

4 1
Open post by hydra_unlimited with ID 18330349147285068
💚 Huge thanks to one of our favorite growers, Emily, for the kind words! Nothing means more to us than seeing our community succeed and hearing how the Hydra Tower is helping growers harvest fresh food at home, in their office, and everywhere in between. Thank you for being part of the Hydra Unlimited family and for sharing your experience with us! Happy growing! 🌱 #HydraUnlimited #HydraTower #GrowTogether #Hydroponics #CustomerReview #VerticalGardening #GrowYourOwnFood
4 1

One of the things that makes the Hydra Tower stand out is how simple it is to perform routine maintenance.

Watch one of our customers show just how easy it is to empty the reservoir and prepare for fresh water. They simply turned off their timer/pump, disconnected the top hose, and got a bucket ready. They then turned on the pump, and easy-peasy, they`re able to drain the system. No moving the system or chance of making a big mess!

Simple. Clean. Built for beginners and expert growers alike.

#HydraUnlimited #HydraTower #Hydroponics #VerticalGardening #IndoorGrowing #GrowSmart #EasyMaintenance

5 1
Open post by hydra_unlimited with ID 18028750388833888
One of the things that makes the Hydra Tower stand out is how simple it is to perform routine maintenance. Watch one of our customers show just how easy it is to empty the reservoir and prepare for fresh water. They simply turned off their timer/pump, disconnected the top hose, and got a bucket ready. They then turned on the pump, and easy-peasy, they're able to drain the system. No moving the system or chance of making a big mess! Simple. Clean. Built for beginners and expert growers alike. #HydraUnlimited #HydraTower #Hydroponics #VerticalGardening #IndoorGrowing #GrowSmart #EasyMaintenance
5 1

Another harvest, another success story. 🍅🌿

A big thank you to one of our growers for sharing another successful Hydra Tower harvest, this time featuring beautiful cherry tomatoes! Seeing growers enjoy fresh, homegrown produce and share their results is what it`s all about.

Thanks for letting us be part of your growing journey @emilyascarlett! Here`s to many more harvests ahead!

#HydraUnlimited #HydraTower #CherryTomatoes #Hydroponics #VerticalGardening

7 1
Open post by hydra_unlimited with ID 18278155567288709
Another harvest, another success story. 🍅🌿 A big thank you to one of our growers for sharing another successful Hydra Tower harvest, this time featuring beautiful cherry tomatoes! Seeing growers enjoy fresh, homegrown produce and share their results is what it's all about. Thanks for letting us be part of your growing journey @emilyascarlett! Here's to many more harvests ahead! #HydraUnlimited #HydraTower #CherryTomatoes #Hydroponics #VerticalGardening
7 1

This grower has been enjoying their Hydra Tower and is excited for some fresh peppers this summer!

🔥 Incredible growth.
🌿 Healthier plants.
🏡 Fresh harvests year-round.

#HydraTower #Hydroponics #HotPeppers #VerticalGardening #GrowIndoors #GrowYourOwnFood

3 1
Open post by hydra_unlimited with ID 17936659287314707
This grower has been enjoying their Hydra Tower and is excited for some fresh peppers this summer! 🔥 Incredible growth. 🌿 Healthier plants. 🏡 Fresh harvests year-round. #HydraTower #Hydroponics #HotPeppers #VerticalGardening #GrowIndoors #GrowYourOwnFood
3 1

Big thanks for another update from @grozinehydroponicsmag on what his young child has been successfully growing with his 16-plant tower! Awesome results!

"The jalapeno HydraTower is assembled, planted and cultivated by our nine year old. And they are the hottest jalapeños we've ever tasted!

The greenhouse basil tower is planted with Genovese and Thai cultivars by the much older kid here.

Family food gardening can't be beat!"

#growingfood #homegrown #herbgarden #kitchengardening #hydroponics

11 1
Open post by hydra_unlimited with ID 18344580958216212
Big thanks for another update from @grozinehydroponicsmag on what his young child has been successfully growing with his 16-plant tower! Awesome results! "The jalapeno HydraTower is assembled, planted and cultivated by our nine year old. And they are the hottest jalapeños we've ever tasted! The greenhouse basil tower is planted with Genovese and Thai cultivars by the much older kid here. Family food gardening can't be beat!" #growingfood #homegrown #herbgarden #kitchengardening #hydroponics
11 1

"Herbs are best fresh, the Hydra Tower is keeping our kitchen singing. So easy!"

Big shout-out to @grozinehydroponicsmag for an update on their 32-plant tower.

#growfresh #growclean #growwithhydra #indoorgarden

11 1
Open post by hydra_unlimited with ID 18604339531002924
"Herbs are best fresh, the Hydra Tower is keeping our kitchen singing. So easy!" Big shout-out to @grozinehydroponicsmag for an update on their 32-plant tower. #growfresh #growclean #growwithhydra #indoorgarden
11 1

🥦Our HHS Secretary visited our partner Kid`s Food Basket in Holland, Michigan with Rep. Bill Huizenga and Kids Food Basket President & CEO Bridget Clark Whitney to see how they`re expanding access to fresh, nutritious food for children across West Michigan.

The tour promotes eating whole, nutrient-dense foods, healthier school lunches, and reducing reliance on processed foods - and we loved seeing our hydroponic systems represented in the greenhouse tours here.

As an USA hydroponic system manufacturer here in West Michigan (design, tested, manufactured, shipped, and supported) - we are looking to continue expanding access to fresh, nutritious food for adults and children across our country. Reach out for more details!

25 5
Open post by hydra_unlimited with ID 18006859994936289
🥦Our HHS Secretary visited our partner Kid's Food Basket in Holland, Michigan with Rep. Bill Huizenga and Kids Food Basket President & CEO Bridget Clark Whitney to see how they're expanding access to fresh, nutritious food for children across West Michigan. The tour promotes eating whole, nutrient-dense foods, healthier school lunches, and reducing reliance on processed foods - and we loved seeing our hydroponic systems represented in the greenhouse tours here. As an USA hydroponic system manufacturer here in West Michigan (design, tested, manufactured, shipped, and supported) - we are looking to continue expanding access to fresh, nutritious food for adults and children across our country. Reach out for more details!
25 5

🌱 Fresh food doesn`t have a season.

With the Hydra Tower, you can grow herbs, leafy greens, strawberries, and more all year long—right from your home. Its compact vertical design saves space, while the automated hydroponic system makes growing simple, clean, and rewarding.

Less maintenance. More harvests. Fresh produce whenever you want it.

🌿 Grow smarter. Harvest year-round.

#HydraUnlimited #HydraTower #Hydroponics #VerticalGardening #IndoorGarden

8 0
Open post by hydra_unlimited with ID 18095870690579498
🌱 Fresh food doesn't have a season. With the Hydra Tower, you can grow herbs, leafy greens, strawberries, and more all year long—right from your home. Its compact vertical design saves space, while the automated hydroponic system makes growing simple, clean, and rewarding. Less maintenance. More harvests. Fresh produce whenever you want it. 🌿 Grow smarter. Harvest year-round. #HydraUnlimited #HydraTower #Hydroponics #VerticalGardening #IndoorGarden
8 0

Take your home grow to the next level with a lab-tested, grower-approved, USA made hydroponic system 🌱💧

The HydraMax 4-Bucket Home RDWC System brings commercial-grade performance home with advanced Venturi circulation, BPA-free food-safe materials, and our pro quick-connect system that is also plumbed to accept a chiller for growers looking to optimize water temps.

Grow bigger, healthier plants with an easy-to-maintain system built to maximize yields and simplify every step of the growing process.

#HydraUnlimited #HydraMax #RDWC #Hydroponics #IndoorGardening

13 4
Open post by hydra_unlimited with ID 17916652278205154
Take your home grow to the next level with a lab-tested, grower-approved, USA made hydroponic system 🌱💧 The HydraMax 4-Bucket Home RDWC System brings commercial-grade performance home with advanced Venturi circulation, BPA-free food-safe materials, and our pro quick-connect system that is also plumbed to accept a chiller for growers looking to optimize water temps. Grow bigger, healthier plants with an easy-to-maintain system built to maximize yields and simplify every step of the growing process. #HydraUnlimited #HydraMax #RDWC #Hydroponics #IndoorGardening
13 4

Big harvests start with healthy roots. 💧🌱

The HydraMax Home RDWC System delivers constant oxygenation, recirculating nutrients, and stable growing conditions to help your plants thrive all the way through harvest.

With our RDWC systems, you`ll enjoy faster growth, healthier roots, and bigger results.

#HydraUnlimited #HydraMax #RDWC #Hydroponics #IndoorGardening

5 1
Open post by hydra_unlimited with ID 17922483621373195
Big harvests start with healthy roots. 💧🌱 The HydraMax Home RDWC System delivers constant oxygenation, recirculating nutrients, and stable growing conditions to help your plants thrive all the way through harvest. With our RDWC systems, you'll enjoy faster growth, healthier roots, and bigger results. #HydraUnlimited #HydraMax #RDWC #Hydroponics #IndoorGardening
5 1

🇺🇸 Happy Independence Day!

We are our proud of our country, grow communities around the world, and the ability to produce our own high-quality food source.

We appreciate being a USA manufacturer and employing hard-working American families today! Have a great weekend and please stay safe!

#hydraunlimited #IndependenceDay #USA #madeinUSA

5 0
Open post by hydra_unlimited with ID 18598184755029306
🇺🇸 Happy Independence Day! We are our proud of our country, grow communities around the world, and the ability to produce our own high-quality food source. We appreciate being a USA manufacturer and employing hard-working American families today! Have a great weekend and please stay safe! #hydraunlimited #IndependenceDay #USA #madeinUSA
5 0

Most of the time, it`s a good habit to thin your seedlings to help maximize the space and let the each plant pod hold one plant at a time.

You can simply pinch these off with your finger or use a small pair of scissors. A lot of us growers plant multiple seeds in each pod, then choose the best one!

#growwithhydra #grownyourownfood #hydraunlimited

2 0
Open post by hydra_unlimited with ID 18110956055479669
Most of the time, it's a good habit to thin your seedlings to help maximize the space and let the each plant pod hold one plant at a time. You can simply pinch these off with your finger or use a small pair of scissors. A lot of us growers plant multiple seeds in each pod, then choose the best one! #growwithhydra #grownyourownfood #hydraunlimited
2 0

Another awesome update from @grozinehydroponicsmag 🙌 (<<<Give them a follow!)

"Starting to enjoy some harvests from our basil tower! We've always grown Genovese varieties in the warm season, however, the Thai variety is proving to be a great addition.
The HydraTower is proving to be an easy way to keep our kitchen singing with fresh, pungent and super clean culinary herbs in a small footprint."

#grownyourownfood #growwithhydra #hydraunlimited

8 0
Open post by hydra_unlimited with ID 17971479321065394
Another awesome update from @grozinehydroponicsmag 🙌 (<<<Give them a follow!) "Starting to enjoy some harvests from our basil tower! We've always grown Genovese varieties in the warm season, however, the Thai variety is proving to be a great addition. The HydraTower is proving to be an easy way to keep our kitchen singing with fresh, pungent and super clean culinary herbs in a small footprint." #grownyourownfood #growwithhydra #hydraunlimited
8 0

We had a chance to connect with Michigan conservationist, professional herbalist, (and all-around awesome person) @woven.apothecary to grow in our vertical hydroponic garden.

🤩 We really appreciate & respect their approach to sustainability, food-access, and being an amazing land-steward in the Midwest. Give them a follow!

Thanks for helping support a locally & family-owned Michigan business and U.S.A. manufacturer!

9 1
Open post by hydra_unlimited with ID 18595938787044806
We had a chance to connect with Michigan conservationist, professional herbalist, (and all-around awesome person) @woven.apothecary to grow in our vertical hydroponic garden. 🤩 We really appreciate & respect their approach to sustainability, food-access, and being an amazing land-steward in the Midwest. Give them a follow! Thanks for helping support a locally & family-owned Michigan business and U.S.A. manufacturer!
9 1

✨ Another 5-Star Review from a Hydra Tower gardener, Jess from Florida! Big thanks!

#indoorgarden #hydroponics #hydratower #growwithhydra

1 0
Open post by hydra_unlimited with ID 18596316136002788
✨ Another 5-Star Review from a Hydra Tower gardener, Jess from Florida! Big thanks! #indoorgarden #hydroponics #hydratower #growwithhydra
1 0

☀️🌱 Shoutout to Jess in Florida for getting her new Hydra Tower up and growing on the backyard porch!

Since the Tower can be used indoors or outdoors, she found the perfect spot! We can`t wait to watch this garden come to life. Fresh herbs, veggies, and flowers are on the way!

Thanks for sharing your journey with us, Jess! Be sure to keep the updates coming. 💚

#HydraTower #HydraUnlimited #VerticalGarden #Hydroponics #FloridaGardening #GrowYourOwnFood #BackyardGarden #HomeGardening #FreshFood #SeedToHarvest

4 1
Open post by hydra_unlimited with ID 17887495803405082
☀️🌱 Shoutout to Jess in Florida for getting her new Hydra Tower up and growing on the backyard porch! Since the Tower can be used indoors or outdoors, she found the perfect spot! We can't wait to watch this garden come to life. Fresh herbs, veggies, and flowers are on the way! Thanks for sharing your journey with us, Jess! Be sure to keep the updates coming. 💚 #HydraTower #HydraUnlimited #VerticalGarden #Hydroponics #FloridaGardening #GrowYourOwnFood #BackyardGarden #HomeGardening #FreshFood #SeedToHarvest
4 1

🥬 Nothing beats fresh food grown right at home! Life is good!

Shoutout to Perry and his journey with the Hydra Tower. Harvesting fresh kale, experimenting with new recipes, and enjoying the process. From seed to plate, it`s been amazing to see how much food can come from such a compact growing system.

Stories like these are exactly why we do what we do, helping people be successful with hydroponics, who now have the ability to grow fresh, healthy food year-round while discovering new ways to enjoy it with family and friends. 🌱❤️

#HydraTower #HydraUnlimited #GrowYourOwnFood #FreshFood #HomeGardening #Hydroponics #VerticalGarden #HealthyLiving #SeedToHarvest #GardenToTable

9 1
Open post by hydra_unlimited with ID 18122854363659173
🥬 Nothing beats fresh food grown right at home! Life is good! Shoutout to Perry and his journey with the Hydra Tower. Harvesting fresh kale, experimenting with new recipes, and enjoying the process. From seed to plate, it's been amazing to see how much food can come from such a compact growing system. Stories like these are exactly why we do what we do, helping people be successful with hydroponics, who now have the ability to grow fresh, healthy food year-round while discovering new ways to enjoy it with family and friends. 🌱❤️ #HydraTower #HydraUnlimited #GrowYourOwnFood #FreshFood #HomeGardening #Hydroponics #VerticalGarden #HealthyLiving #SeedToHarvest #GardenToTable
9 1
Secret Link

summer hydra tower sale.

GET 20% OFF @checkout

Automatically take off 20% on any vertical hydroponic garden order at checkout - no signup required, just amazing results.

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