yeh there abit of a mystery when it comes to finding people on the net using IWS systems, it stands for INTELLIGANT WATERING SYSTEM, which im sure u already knew lol, the fellors in growell are always raving about them and like i say, i know of someone who averages between 8-12oz per plant using them. I'd just like to see a journal where someones using them before taking the gamble as they are on the pricey side....I'm reverting back to the airpots now tho after i've just seen your little result lol fookin decisions man!!