The Alien RDWC 20L Black Series is a premium deep water culture (DWC) system engineered for serious growers seeking faster plant growth, explosive yields, and greater control over nutrient delivery. Designed with professional cultivation in mind, this recirculating DWC system ensures exceptional oxygenation and nutrient uptake thanks to its highly efficient undercurrent system and integrated air kit. Whether you're running 4 pots or scaling up to 48, the Alien RDWC 20L system delivers consistent performance, ease of maintenance, and outstanding results across all grow spaces.

Constructed from the highest-grade materials, the Black Series features heavy-duty pots and fittings, anti-light pipework to reduce algae build-up, and professional air stones to promote oxygen-rich water for healthy root development. Each system arrives pre-configured with a central brain pot for water management, and can be easily upgraded with compatible Alien accessories such as water chillers and top-up kits for a fully automated grow environment.

Features

• Black Series finish reduces light penetration to inhibit algae growth
• Re-circulating deep water culture system (RDWC) for fast-growing hydroponic performance
• Multiple pre-set system sizes: 4, 6, 8, 9, 10, 12, 15, 16, 18, 21, 24, 28, 32, 36, and 48 pots
• Powerful air pump included for high oxygenation rates
• Centralised control pot with easy drain system
• Heavy-duty, opaque 20L pots with large root space
• Upgradeable with Alien Pro accessories, chiller-ready and easy to maintain

Included Parts

• 20L heavy-duty RDWC pots (quantity based on selection)
• Centralised brain/control pot
• Air pump(s) and manifold
• Professional air stones
• Pipework and connectors
• Pot lids with net pots
• Grommets and seals
• Instruction manual and setup guide

Pipe Sizes

• 32mm, 50mm or 63mm pipework (depending on system size)
• Anti-light, black pipe to reduce algae formation
• Strong, low-maintenance fittings for secure connections

Recommended Water Chiller (not included)

All orders are packed in plain discreet parcels with non descript labels for your personal security.

We offer the following shipping options to the mainland UK. If you live outside mainland UK please call us on +44 (0)1142 280024.

Royal Mail delivery options (mainland UK)

Royal mail tracked  £4.75 (up to 2KG only) 2-4 working days

Royal mail tracked  £3.75 (up to 2KG only) 3-5 working days

Courier  Delivery service options (mainland) Zone A Zone A+ Zone B Zone B+

Free delivery up to 25 kilos (over £99) 1-2 working days service 
Next working day  £6.75 up to 25KG 
Next working day am £9.95 over 25KG

Courier Delivery service options Zone C Zone C+ Zone D Zone D+

Next working day  £29.95 + 75P per kg over 25KG
Next working day am £35 + 75P per KG over 25KG

All packages are shipped in plain, discrete packaging. Absolutely NO information is passed to third parties.

Please note that paid for next day delivery only applies if you order before 1PM Monday to Thursday.

Our UK delivery zones: In the UK we have 4 zones. Prices and parcel delivery times vary by zone.


Tracking your consignments

Our deliveries are handled by Parcelforce or DHL PARCEL UK depending on the weight and location.You are able to track your parcels by using your consignment number or customer reference and postcode. If using a reference number to search, please also insert the delivery postcode. You will receive an email on the day for dispatch confirming your order and tracking number, with DHL PARCEL UK option you can select a delivery window or change the day of delivery by clicking the link below and manage my delivery option.


Other Services Available

Isle of Wight & isles of Scilly £5.99 extra per consignment

Timed booked delivery £15.99 extra per consignment

Long bulky items £29.99 extra per consignment (1.4m x 0.8m 0r two persons needs to carry )

We Won't Be Beaten On Price

At Hytec Horticulture we are committed to offering the best range of hydroponic products at the best possible prices. This is why we have our Price Match Promise, whereby if you find an identical product at one of our competitors for a lower price, we will match or even beat it.

In an ever-increasingly competitive marketplace, many product lines are being sold at varying prices. We want to give you the best deal so if you find any of the products we sell (or comparable products) at cheaper prices, give us a chance to get your business, save you money, and beat that price. 

Terms & Conditions

To qualify for the Price Match Promise, the product must conform to the following:

• The product in question must be identical (it should be the same brand & model and for sale with the same terms & conditions)
• The product must be held in stock by the competitor at the time you want to make the price match
• In addition to the above, we must also have the product in stock
• We must be able to verify the lower price either by the store's website, a phone call or a written quote on headed paper
• The product is not part of a promotion, sale or clearance offer
• The product must be available from a physical store that’s open to the public
• Our Price Match Promise is not available against web-only retailers, for example, eBay or Amazon, along with factory outlets, private or liquidation sales
• Typographical errors, incorrect pricing, voucher codes or additional discounts by the competitor, including their own price match offers, are excluded 

Large & Multiple Product Orders

If you want to place a large order with multiple products (for example, you're setting up a grow room from scratch and require a full setup including tent, lights, extraction, nutrients, grow media etc) then get in touch and we will aim to match, or even beat any quotes you’ve been given. 

Online Price Matching

Please fill out the form below with a link to the website and we will email back with our best price.