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RDWC 21 pot 3 row 20L hydroponic system diagram with grey pots, tubing, reservoir, and air pump.
Top-down view of a 21-pot, 3-row RDWC hydroponic system with grey square pots, connected by tubing to a remote header kit.
Overhead diagram of an Alien Hydroponics RDWC 21-pot, 3-row, 20L system with remote header & air pump.
Top-down view of an RDWC 21-pot, 3-row hydroponic system with remote header kit and air pump.
Top-down view of RDWC 21-pot, 3-row, 20L hydroponic system. Grey pots, blue/grey tubing, remote header.
Alien Hydroponics RDWC 21 pot, 3 row, 36L compact header kit with air pump system diagram.
Diagram of an Alien Hydroponics RDWC 21-pot, 3-row, 36L compact header kit with square pots and piping.
Top-down view of a 21-pot 3-row RDWC hydroponic system diagram, grey square pots, connecting pipes, header kit.
RDWC 21 pot 3 row 20L hydroponic system diagram with grey pots, tubing, reservoir, and air pump.
Top-down view of a 21-pot, 3-row RDWC hydroponic system with grey square pots, connected by tubing to a remote header kit.
Overhead diagram of an Alien Hydroponics RDWC 21-pot, 3-row, 20L system with remote header & air pump.
Top-down view of an RDWC 21-pot, 3-row hydroponic system with remote header kit and air pump.
Top-down view of RDWC 21-pot, 3-row, 20L hydroponic system. Grey pots, blue/grey tubing, remote header.
Alien Hydroponics RDWC 21 pot, 3 row, 36L compact header kit with air pump system diagram.
Diagram of an Alien Hydroponics RDWC 21-pot, 3-row, 36L compact header kit with square pots and piping.
Top-down view of a 21-pot 3-row RDWC hydroponic system diagram, grey square pots, connecting pipes, header kit.

Alien Hydroponics RDWC - 21 Pot 3 Row

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MODEL: BD100-1321C
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Alien Hydroponics RDWC - 21 Pot 3 Row

Achieving commercial-scale yields shouldn't require a degree in engineering. The Alien Hydroponics RDWC 21 Pot 3 Row system solves the complexity of large-scale hydroponics by providing a high-performance, recirculating deep water culture setup that is as easy to maintain as it is productive. Designed to super-oxygenate your nutrient solution, this system ensures your roots are always bathed in the perfect environment for explosive growth.

Whether you are a professional cultivator or an ambitious home grower, this RDWC hydroponic system eliminates the risks of nutrient stagnation and oxygen deficiency. For those working with slightly smaller footprints, the Alien Hydroponics RDWC 12 Pot 3 Row offers the same commercial-grade technology in a more compact configuration. Built with the signature quality of Alien Hydroponics, this 21-pot layout is the gold standard for maximizing canopy coverage and yield consistency.

Alien Hydroponics RDWC 21 Pot 3 Row complete system kit

What's Included

  • 1x RDWC Circulation Water Pump 30
  • 1x RDWC Header Pot Complete
  • 21x RDWC Pot 20L
  • 22x Silver Lid
  • 1x Header Pot Blank
  • 21x Square Net Pot
  • 21x Air Injection Ring
  • 4x Elbow 50mm Dual Flow
  • 36x 50mm Straight Dual Flow
  • 3x Tee 50mm Dual Flow
  • 43x Washer 50 X 64mm
  • 43x Nut 50mm Dual Flow
  • 2x RDWC Tee, Ball Valve and Filter
  • 2x Tee 16mm Barbed
  • 3x Plug - 16mm
  • 2x Elbow 16mm Barbed
  • 21x Tee 16mm - 6mm Blue
  • 21x Pot Clip 16mm
  • 1x Tee 19mm Barbed
  • 15x Pipe 6mm Blue Bulk by Meter
  • 17x Pipe 16mm Silver Bulk by Meter
  • 6x Pipe 19mm Blue Bulk by Meter
  • 2x Pipe 50mm Silver 100cm Piece
  • 13x Pipe 50mm Silver 66cm Piece
  • 1x Wrench 50mm
  • 1x Pipe Cutter 50mm
  • 1x RDWC Instructions

Features

🌱
Accelerated Growth & Higher Yields

Reduces vegetative time and accelerates flowering for faster, larger harvests.

💧
Clog-Resistant Dual-Flow™ Fittings

Oversized 2" fittings minimize root blockage for consistent nutrient delivery.

🔗
Flexible & Scalable Design

Modular system adapts to various grow sizes, allowing for easy customization and expansion.

💸
Efficient Nutrient Management

Requires minimal medium and recirculates solution, reducing setup and operational costs.

💨
Superior Root Oxygenation

JET-STREAM A.I.R.™ rings provide constant, high-pressure oxygen for healthy root development.

🛠️
Easy Setup & Maintenance

Threaded fittings and snap-on pipes allow for a glue-free setup and easy reconfiguration.

🛡️
Heat-Reflective & Durable

Heat-reflective silver polymer maintains cooler solution temperatures for optimal root health.

⚙️
Customizable Configurations

Offers numerous options to maximize growing space with remote headers and multiple pot sizes.

Setup and Maintenance

System Setup Steps:

1. Prepare Pots

Attach the necessary fittings to the pots.

2. Connect the System

Establish a recirculating network by connecting the pots and header pot with silver piping.

3. Install Air System

Connect the air pump to the JET-STREAM A.I.R.™ rings located in each pot.

4. Integrate Pumps

Install the water pump for consistent recirculation and nutrient delivery.

5. Set Up Nutrient Tank

Connect your external nutrient tank to the system header.

6. Fill the System

Add water and check for the correct fluid level before activating the pump.

Maintenance Tips:

  • Maintain nutrient solution temperatures between 18-20°C (64-68°F).
  • Recirculate nutrients thoroughly before testing and adjusting pH/EC levels.
  • Ensure the net pot substrate is properly watered during the initial planting phase.
  • Use the designated drainage fitting for periodic system flushes.
  • Apply preventative root health solutions to maintain a clean internal environment.

Specifications

Specification Value
Number of pots 21
Number of rows 3
Kit total fluid volume (20L Pots) 93 gallons / 352 liters
Kit total fluid volume (36L Pots) 164 gallons / 620.8 liters
Minimum Assembled Size (Compact Header, 20L) 113" (L) x 48⅞" (W)
Maximum Assembled Size (Remote Header, 20L) 209" (L) x 100" (W)
Water Pump Included RDWC Circulation Water Pump 30: 500 GPH, 45 Watts
Air Pump (Required) Minimum 55.5 GPM / 210 LPM

Support & Manuals

Warranty

The Alien Hydroponics RDWC system comes with a one-year manufacturer's warranty for your peace of mind.

FAQs

What is the main advantage of an RDWC system?+

Recirculating Deep Water Culture (RDWC) systems constantly circulate a highly oxygenated nutrient solution through the plant's root zone. This process, also known as Deep Water Culture, promotes explosive root growth, leading to faster vegetative cycles and significantly larger yields compared to traditional soil or other hydroponic methods.

Is this 21-pot system difficult to set up?+

No, the Alien Hydroponics RDWC system is designed for straightforward assembly. It features threaded fittings and snap-on pipes that require no glue, making setup, breakdown, and reconfiguration simple. Detailed instructions are included to guide you through the process.

What's the difference between the 20L and 36L pot options?+

The primary difference is the volume available for root development. The larger 36L (9.5 gallon) pots are ideal for growing larger plants with extensive root systems, while the 20L (5 gallon) pots are excellent for medium-sized plants or situations where space is more limited.

Can I expand or modify this system later?+

Absolutely. The modular design is a key feature of the Alien RDWC systems. You can easily add more pots, adjust spacing, or reconfigure the layout to fit a new grow space or expand your operation as your needs evolve.

What makes Alien Hydroponics systems different from others?+

The Alien Hydroponics brand focuses on innovation. Key differentiators include the patent-pending Dual-Flow™ fittings that prevent root clogging, super-efficient JET-STREAM A.I.R.™ rings for maximum oxygenation, and heat-reflective silver polymer construction.

Is a 21-pot system suitable for a beginner?+

This 21-pot system is designed for serious, large-scale cultivation. While its user-friendly design makes it manageable, a complete beginner might find a smaller system less intimidating. We recommend starting with a more compact kit, such as the Alien Hydroponics RDWC 12 Pot 2 Row, to get familiar with the RDWC method before scaling up.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

  • Most orders are processed within 24-48 hours after being placed.
  • Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

  • USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
  • FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
  • UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

  • These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
  • For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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