go read soil-vs-hydro @overgrow magazine homepage...It isn't exactly what you are doing, but if you read it you will find alot of useful ideas and information...I conducted the very same test with great results...the article is written by Smoothy in 2004 and if you are new I think the whole article is a how to...my soil plants thrived in his soil recipe and although I don't know if I could've jack-up my nutrients levels in the hydro side ...I had little stress and 14 out of 18 female grown from seed...until 2 hermied yesterday, but I have been watching them...almost was too late on the worst one, but I loved it when he said, I use way less nutrients than most people, hmmm less nutrients=less money...IMHO...we all would like to have a truncheon meter, but when you talk about saving money, you won't accomplish that, because they are expensive, remember a wise old grower once told me to watch your babies, they will tell you when they are sick...and you might want to take a couple of those kickin Amsterdam seeds and put them in the soil mix I mentioned just so you get to try them out...oh well I'm ramblin'...hope this helps...come on to Peace, latewood