"The famous IWS system in my opinion is the best active system around, the Pro is awesome!"


IWS Flood and Drain System

Up to 80 plants can be managed from one timer and one water butt, with the IWS Flood and Drain - The most popular modular hydroponic system.


How IWS Flood and Drain hydroponic systems work

At the set times solution is pumped from the water butt into each pot allowing the plants to feed and pushing out air. Floats ensure the same level of solution rises into every pot.

When the solution drains from the pots fresh air is pulled into the rootzone. The drained solution is pumped back to the water butt, rebalancing the pH and EC.

Because stale air is replaced with fresh oxygen-rich air at every feed the roots are well oxygenated which drives more productive growth.

Drainage is excellent with this grow system, so it is important to remember to increase the amount of feeds as the plants grow.

System Option Pot Stands Copper Disc Inserts Remote Timer
F&D Standard No No No
F&D Pro Yes Yes Yes
F&D Remote Yes Yes Yes

Why They are Great

Perfect for growers who want to:

  1. Choose how to space pots
  2. Benefit from the oxygen-rich nature of pebbles
  3. Finely tune feeds
  4. Grow on a larger scale or add pots at a later date
  5. Manage one water butt for many plants


IWS Flood and Drain Systems available from 6 to 80 pots.  

Pots sizes are 5.5 and 9.5 litre

3 pot options available: Culture, Aqua & Punched

Hints and Tips

  Feed Time Guide for 60/40 Feed Time Guide for pebbles
Start 2 x 15 minutes feeds per day 2 x 15 minutes feeds per day
Veg 3 x 15 minute feeds per day 3-4 x 15 minute feeds per day
Flower 4-5 x 15 minute feeds per day 4-6 x 15 minute feeds per day

As with all methods of growing increase or decrease feeds according to plant requirements.
Check out our guide to planting out in a IWS Flood & Drain system 



Flood & Drain Pro Download View
Flood & Drain Standard Download View
IWS Brochure Download View

What our Retailers are Saying

Rootzone: "The famous IWS system in my opinion is the best active system around, the Pro is awesome!"

Med Gardener: "IWS Flood & Drain systems produce better results than any other even though they are so simple. Once set up you hardly have to do anything other than fill your tank once a week."

Hydroponica: "IWS Flood & Drain is one of our favourite systems. They are reliable and produce great results."

Euro Garden: "IWS Flood and Drains are the most reliable systems and achieve great yields."

GoGreen: "The IWS Flood and drain is easy to use and produces big yields"