Hey Stinkyattic. Thanks for the reply. However this only does more to confuse a pathetic noob such as myself. I am concerned about what to do about my watering situation and conflicting sources abound. I read a source on the importance of R/O water and was convinced that the ph factor of it was perfect for trying to keep things simple. But when i read your post on tap water being just fine and slighty benificial because of the minerals (and lack there of in R/O water). I am now unsure. So I read the label on my "walmart" sodium free pure drinking water and saw that it just comes from municipal water in columbus OH. It is then distilled and run through an R/O filter im guessing. Am i going to get a bunch of junk i dont want my plants getting if i use tap water? Also, im using the botanicare pro line of ferts. The guy at the hydro shop tells me im gonna need calmag a couple weeks into the flowering cycle, but its okay to get epsom salt for that. Is that true? And is there any light you can shed on my total ignorance of ph. I was under the impression that the goal of using r/o water and so forth was to have a nuetral ph, now im reading that nuetral can cause nutrient lock out. Please help. im about to go insane. Your loyal apprentice. Tigersfan420.