Flood & Drain Systems
IWS flood and drain systems: the standard system with remote brain, the IWS PRO, and the Trident in 16 and 25 litre pots, with the standard and Pro fittings and spares to build or extend them.
In StockIWS
IWS Flood & Drain (Std. Remote)
£571.46
In StockIWS
£700.16
In StockIWS
IWS Trident Spares & Accessories
£0.86
In StockIWS
£0.86
In StockIWS
£0.36
In StockIWS
£4.28
Pre-OrderIWS
IWS Trident Flood & Drain - 25L
£733.46
Pre-OrderIWS
IWS Trident Flood & Drain - 16L
£699.26
About Flood & Drain Systems
How flood and drain works
Each plant sits in a pot of clay pebbles in a tray. Several times a day the brain pot pumps the nutrient solution out to flood every tray, roots drink and take up feed, and then it all drains back to the tank, pulling fresh air down through the pebbles. Every pot in the system is fed and drained together on one timer, so a 12-pot room is as easy to run as a single pot.
Standard, Pro or Trident
The standard system uses the classic remote brain and pots. The PRO uses larger fittings and a faster flood for bigger rooms. The Trident is IWS's newer design with a 16 or 25 litre pot and its own fittings. All three grow one pot at a time, and the fittings and spares here keep them running.
Medium and feeding
Clay pebbles, rinsed, are the standard medium; some growers use a 60/40 pebble and coco mix for a bit of buffering. Change the tank weekly and keep an air stone in it. See the hydroponics guide for how flood and drain compares with NFT, drippers and Autopot.
Growers' Guides
- Root Rot (Pythium): How to Spot, Fix and Prevent ItWhat root rot (pythium) looks like, what causes brown, slimy roots in hydroponics, soil and coco, how to prevent it and how to fix it.
- Flood and Drain Systems: How Ebb and Flow Hydroponics WorksHow flood and drain (ebb and flow) hydroponics works, the IWS systems we sell, what to grow in, tank care, and flood and drain vs DWC, NFT and Autopot.
- Clay Pebbles and Rockwool Cubes: How to Use Them in HydroponicsWhat clay pebbles and rockwool are, how to rinse, soak and plant in them, which hydroponic systems each suits, and how they compare with coco.
- Canna Aqua Feed Chart for Hydroponics: Doses and EC by WeekThe CANNA Aqua feed chart and grow guide for recirculating hydroponics: Aqua Vega and Flores A & B doses by week, the additives and the EC to aim for.