For crying out loud, people. You cannot do hydro or soilless without some way of measuring PH. You shouldn't even try it in soil. A digital PH pen is $20 and a regular dumb-ass kit is about $6. Do not buy rockwool, nutrients, a fan, a ballast, or any other damn thing until you have a PH pen or test kit figured into your budget and are committed to purchasing one soon.

What the hell, am I in the twilight zone over here? Newbies, listen to this and listen good: Attempting a hydro grow with some way to test PH is analogous to saying, "Gee I really need to get to that place within the next 30 minutes. That place is 35 minutes away by car. There's no possible way that I could come up with a car at this point, but what the hell. I think I'll put a whole bunch of effort into it anyway."

Good luck with that, and don't come crying to me with your problems if you try it.
Opie Yutts Reviewed by Opie Yutts on . Soak rockwool without knowing PH? Is there any way I could soak rockwool without knowing the PH is 5.5? For instance... is there a bottled water company that has a PH of 5.5 ? Rating: 5