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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.!

HydraMax 4 bucket, 2 Row Home RDWC System

SKU: HK-04-2-24 Categories: ,

HydraMax 4-Bucket Home RDWC System
Upgrade your grow with the chiller-ready HydraMax 4-Bucket Home System WITHOUT the need for air-stones or air-pumps, or a separate reservoir. This system was designed to be adaptable to a chiller system to help regulate water temps, it does not come with a chiller unit.

This system is a media-less recirculating deep water culture hydroponic system that brings our commercial-grade technology and higher grow yield opportunities to your home, allowing for up to 25-30% increased yields vs. other grows methods.

Our kits are all designed and made in the U.S.A. with U.S.A. parts, we want your system and all the parts to last for years and decades, not months. HydraMax systems stand out with our advanced Venturi circulation for powerful oxygenation and nutrient delivery, and patented parallel flow tech for streamlined circulation, cleaning, draining, dosing, and homogenization – allowing simple tasks to be done in minutes, not hours!

Our company stands out for our dedication to our growers and the industry, as well as our dedicated sales, customer service, and parts support teams. Start today and expect to streamline your processes, maximum your yields, and crush your grow goals with an easy-to-use, next level hydroponic system.

$659.99

Estimated delivery by 04/03/2026

Add Additional Neoprene Collars

  • Click Images To Add Packs *

    3.5" Neoprene Collar – 10 + $29.95
    3.5" Neoprene Collar – 150 + $441.93

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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

Chiller-Ready, Tent-Ready, Cultivator Approved
Upgrade your grow with the HydraMax 4-Bucket Home System. This chiller-ready, RDWC hydroponic system brings professional-grade technology to your home at an unbeatable price. With advanced Venturi circulation for powerful oxygenation and nutrient delivery, it's designed for maximum yields in a compact space WITHOUT the need for air-stones or pumps!

Cultivate With Confidence, No Reservoir Needed
Take full control of your grow environment, optimizing water temperature and root health for rapid, robust growth. Enjoy a more organized grow environment and more floor space with an optimized system design; low-profile, no-leak quick connection plumbing, and no reservoir needed! Due to the balance between Venturi circulators and the unique design of our drain orifices, this creates complete stability of the system. Spend minutes dosing, not hours!

Industry Leading Product-Yields
Many of our Home, Professional, and Commercial growers have found 25-30% increases in yields on average once they get familiarized with our HydraMax systems. Overall, our RDWC systems provide dramatic decreases in pests and plant loss failures through plant disease. HydraMax allows for growers to efficiently monitor and adjust for their plants along their grow cycles, and our entire recirculation method allows for powerful oxygenation and nutrient delivery, helping create one of the industry leading systems available on the market!

4-Bucket Home VS. 4-Bucket Professional
While the HydraMax 4-Bucket Home system and the 4-Bucket Professional system are chiller ready, the 4-Bucket Professional system is meant for growers that need further customization, are looking to build out automated dosing and watering capabilities,  and for those that plan on scaling their systems up at a later date. The 4-Bucket Home system is one of our most affordable systems, and as such, is a stand alone system, and non-customizable.

This Recirculating Deep Water Culture System includes:

• Four 8-Gallon Buckets w/ legs
• 4 Lids w/ inspection port & cover
• 4 Venturi Circulators
• Complete Qwik-Lok Plumbing Assembly (all necessary hoses and connectors)
• 1 Heavy Duty Danner 9.5 Pump, 1 Pump stack
• Four 5.5" Root Halo snap-in media-less netpots, each with neoprene collar insert.
• 1-Year Warranty
• Recommended chiller is a 1/10HP unit (Chiller does not come with system).

 

*The following items are required for installation but are not included: Teflon Tape, Scissors, Pliers or Wrench

**Important Shipping Notice: Expedited shipping only applies to parts and fittings – All HydraMax Professional systems ship in 7 days or less by standard ground service.**

Additional information

Weight 42 lbs

About Us

World-Class Engineering, Product Quality, Support, and Grow Results

With an extreme dedication to quality, innovation, and plant-centric results, our hydroponics systems stand as pioneers in the industry with proven results. Hydra Unlimited is proud to be a vertically integrated company, meaning all products are designed, engineered, tested, manufactured, and shipped directly by our organization in Michigan, U.S.A.

Elevate your growing endeavors with HydraMax or Hydra Tower – where amazing grows meet simplicity and where plant quality meets efficiency. Embrace the future of cultivation and unlock your garden's true potential with Hydra Unlimited.

Instructions

Installation Manual

Installation Manual (Pre-2023)

HydraMax Brochure

Product FAQs

Tools and Grow Guides

Deep Water Culture Education

What Growers Have To Say

Explore our Community

@grozinehydroponicsmag

"The 32 site HydraTower is at home in the backyard greenhouse. Set up was a breeze.

Easy operation and lots of planting sites in a relatively small footprint have us excited about starting our seeds in this vertical garden! 🌱💦"

#verticalgarden #hydroponic #grow #hydratower #growyourfood
9 3
✅ Why is the supply hose on the OUTSIDE of our Hydra Towers?
 
Great question, and the answer is simple: performance beats pretty every single time.
While other systems hide everything inside to look
6 0
@grozinehydroponicsmag is setting up some new family vertical gardens 🌱Kids LOVE getting involved with our grow towers! Thanks for the awesome feedback!

"This 16-site HydraTower is up and running, with a 32-site system going into the greenhouse next. Seeds are in for compact jalapeños—now the fun begins.

Clean design, easy setup, and some very clever water movement built in to keep the nutrient solution highly oxygenated. Excited to see how these perform. 🌶️"

#growwithhydra #Hydroponics #VerticalGarden #GrowYourOwn #IndoorGrowing
22 1
A highly respected and long-time RDWC Commercial Cultivator on the East Coast hit us up last week to get a quote on Root Halos. They are now proud owners!

One of the many benefits they listed was the way the Root Crown forms through the basket with ease, no longer pushing the plant up and risking support. 

They compared them to their traditional basket over the course of a few full cycles. They noted decreased man hours in fixing plant support, as well as plant removal and cleaning time. 

In times like these, it's important to be lean and efficient, and these guys are on the right track! Hit us up for a quote today or head over to hydraunlimited.com to see why these net pots are king. 

#hydroponics #hydramax #rdwc
8 0
The kids are asleep and mama is getting it done 💪🏼😤
Looking forward to seeing this new 32-plant @hydra_tower get started this month!!

Check out @boulterfamilyfarm to follow her homestead and new hydroponic journey!

🌻The Hydra Tower Vertical Hydroponic Garden is available in a 16 or 32-plant tower, enjoy free shipping and 20% off now through end of March at checkout! 

#plants #homestead #plantcore #hopecore #greenhouse
13 2
Success in hydroponics comes down to simple habits, regular maintenance and cleaning go a long way in keeping your system healthy from one harvest to the next.

🍀Lucky for you, the Hydra Tower breaks down in just a few easy steps, making it simple to clean each component and keep bacteria and plant diseases under control. 🌱💧

#plantlife #growwithhydra #hydratower #hydroponics #gardening
4 1
We've been getting asked about some of the key differences with our system vs. other vertical systems, here are a few key differences our growers are already loving ✨ 

✔️ No subscriptions, monthly fees, & the ability to source your own seeds
✔️ Made in the USA, not overseas, with trusted Food-Safe, BPA-Free, UV-Resistant material.
✔️ Patented & advanced NFT aeration delivery to your plants roots = faster/larger grows.
✔️ High-quality parts that will last years and years of continual year-round use without breaking just after one or two grows.
✔️ Award-winning customer support, sales, & engineering teams to back up your success!

Need more reasons? Give us a call or send us a DM with any questions.
14 1
Temperature: The Silent Variable in Germination 🌡️

Success in a vertical system starts with understanding water temperature. While the HydraTower is designed to allow for in-system germination, the "time to sprout" is heavily dictated by your reservoir's environment.

Our latest guide breaks down the two main speed lanes:

Cooler Water (65°F-75°F): Ideal for leafy greens like Lettuce and Bok Choy.

Warmer Water (75°F+): Essential for Fruiting crops like Tomatoes and Peppers.

Expert tip: If you're mixing crops, aim for a "sweet spot" of 72°F to keep both sides of the aisle happy and always compare typical germination rates so they keep up with each other!
9 0
Hydra Tower Tools Required: Just "these hands" 🙌 

We say "under 10 minutes". Just this week, a 9-year old did it in 5 and an 82-year old gentlemen did it in 8. 

We are not joking... ask us for the receipts. 

Seriously, not only is this crucial for speed to planting, but regular maintenance (putting the components in the dishwasher after harvests) is so easy, it isn't even a thought. 

#HydraTower #HydraUnlimited #VerticalGardening #HomeGrown
10 0
There's nothing quite like sharing the wonder of nature with the ones you love most. 🌿✨

Teaching the next generation where their food comes from isn't just a fun activity—it's a gift for their future health. With the Hydra Tower, we've made it simple to grow nutrient-dense greens right at home, so you can focus on making memories and passing down healthy habits that last a lifetime. 🥗👵👶

From our family to yours, we're proud to help you grow a harvest for every generation. 🇺🇸

#hydratower #growyourown #healthyliving #familytraditions #cleanliving #sustainableliving #gardeningwithkids #growwithhydra #farmtotable
6 0
President's Day might be today, but our 20% off Early-Bird Special is sticking around all February long! Whether you're looking to save on groceries or just want the freshest greens possible, the Hydra Tower makes it easy to grow 365 days a year. 

USA Made
BPA-Free & Food Safe
1-Step Seed to Harvest
Plant Killer-proof 😉 

Order online today and enjoy FREE shipping on both our 16-plant and 32-plant towers! 

#HydraUnlimited #VerticalGarden #PresidentsDaySale #GrowYourOwn #Hydroponics
19 1
A nice looking & new grow showcasing the start of Marigolds and tomatoes! Can't wait to see this start to fill out!

#hydratower #growwithhydra #growyourown
10 0
✅ Featured here are the plants and healthy root development from just 7 out of the 8 tower sections on our newest 32-Plant Hydra Tower.

🥬 This vertical hydroponic garden helped grow an awesome spread of lettuces, basil, and flowers which took up over 12ft. of space when spread out on a couple of our conference tables - all grown in just over 1sq.ft. of space, with an estimate of .38 cents in utility costs per day.

What isn't shown? All the armfuls of basil and lettuce we told our staff to stop eating so we could get a few decent videos!! 😅

#hydroponicgrowing #foreveryone #gardening #growyourown #growwithhydra
14 1
Introducing: Hydra Tower, the Vertical Hydroponic Garden! 

Say it with me, I will not waste yet another trip to the grocery store for wilted and moldy produce; we've ALL been there!

Hydra Tower puts an end to that. Proudly made in the USA, it's designed to give you fresh, nutrient rich, pesticide-free food in the comfort of your own home, YEAR ROUND. The robust design is made with food grade, BPA-free materials and adds life to your kitchen, your balcony, or your classroom. 

Best part is, early-birds can enjoy a 20% discount on our website now until March. This week will be filled with fun and educational content! Is there something you'd like us to cover specifically? Let us know in the comments, we'll be happy to answer!

#hydroponics #verticalgarden #seedtoharvest #freshfood #healthylifestyle #growyourownfood #gardening
21 3
💧 Always innovating, always growing! Something new is coming this year in February 2026, keep your eyes peeled!
22 1
Professional vs. Home – Key Differences
 
HydraMax Professional
Built for serious growers and commercial setups. Engineered for expandability and scalability, from 4 buckets to 32+ with Qwik-Lok plumbing and recirculating RDWC technology that makes outfitting an entire grow room fast and seamless. Delivers commercial-grade performance.
 
HydraMax Home
The same patented technology in a compact, space-saving design. Ideal for apartments, closets, tents, or hobby grow rooms. Perfect starter system that brings world-class hydroponics to any environment.
 
Both use our proven recirculating RDWC system, just choose the scale that fits your space and goals.

#Hydroponics #HomeGrowers #GrowTech #HydroSystems #IndoorGrowing
25 1
Start the year with smarter systems and sharper results.

With precision-engineered RDWC tech from Hydra Unlimited, every grow is a step toward bigger yields, cleaner ops, and more green in every sense.

Let's make 2026 your most productive year yet.

#GrowSmarter #RDWCtech #HydroponicInnovation #HydraUnlimited #YieldMoreWasteLess
15 0
What happens when you remove grow media from the equation?

Root Halo & TetraBase support plants without media, they help reduce labor, are reuseable, and allow less restricted root development. Overall, these help with reducing overall pest, pH fluxuations, and disease issues.

Our growers love these media-less product and so will you. Reach out or visit our website to make the swap today.

#RootHalo #Hydroponics #RDWC #RootDevelopment #HydraUnlimited
4 0
Built different — on purpose.

HydraMax RDWC systems are designed to eliminate common points of failure found in traditional hydroponic setups. No epicenter, quick nutrient feeding and homogenization, Venturi-based circulation instead of airstones, and clean-in-place maintenance capability, growers can simplify operations and reduce downtime between cycles.

This is system design focused on consistency, scalability, and long-term performance.

#RDWCSystems #HydroponicEquipment #GrowRoomDesign #CommercialCultivation #HydraUnlimited
6 0
Your plants are constantly giving you data — you just need the right system to read it.

In a closed-loop RDWC system, water use is driven by plant evapotranspiration. By tracking consumption over time, growers can identify early outcome trends and make informed adjustments long before harvest.

This isn't guesswork. It's measurable insight — built on real-world data from a 16-week RDWC case study.

Grow smarter. Manage risk earlier. Let the plants lead.

#RDWC #HydroponicGrowing #ControlledEnvironmentAg #GrowData #HydraUnlimited
16 1
Stop throwing money away on disposable grow media.

We offer two innovative alternatives: Root Halo™, our media-less, snap-in netpot designed to simplify resets, reduce pest problems, and enable healthy root development -- and TetraBase™ an easy to use "forever media" that anchors in plants, is 100% reusable, and easy to clean - boasting similar benefits as Root Halo.

Less labor. Less waste. More control.

#Hydroponics #RDWC #MediaLess #GrowBetter #HydraUnlimited
15 2
Secret Link

EXTENDED EARLY-BIRD SPECIAL!

GET 20% OFF!

Automatically take off 20% on any Hydra Tower order through the end of March!

Hydra Unlimited
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