It was thanks to your watering suggestions that I managed to finally settle on my watering shedule, at the moment I just add my grow nutes to the tank at 5ml per Gallon. This basically means I can just come back to them every other day and remove any run off (very little atm) and just top up as an when needed generally every 6 days, and my tap water needs alittle ph down (I use Canna organic Citric acid I think) before settling at about 6-6.3 adding the nutes at the sametime. Its actually a very easy way to go about things considering Ive never used a wilma system and Im not even using it the way it was intended. The only ajustment to the system i had to make was to raise the pots alittle so they were'nt sitting in a puddles, but the run off is minimal so Im not sure I needed to, better safe than root rot I guess. Thanks for your earlier advice by the way all good stuff. E.Z S.K