Cheers man! I'll go and have a read shortly.
What I want is a QUIET hydro system because it's going to have to go in my bedroom. Cost is important, under 100 quid for 3 or 4 plants worth of equipment. My tent is 120 wide by 80 deep. I need to see and hear a Wilma in action before I commit, really. That's probably the next step. How long can it go without having to pump the water, but avoiding the roots drying out?