IWS Trident Flood & Drain Grow SystemIWS Trident: Advanced Flood & Drain Systems The original IWS Flood & Drain grow systems are still extremely popular, decades after they were first developed. Improving on a design that has proved itself over that time scale wasn't easy But the team at IWS have gone and done it! The IWS Trident features an array of design tweaks and upgrades that accelerate performance without over complicating the system. You now get fabric inner pots and larger outer