Quote Originally Posted by Illusion
i use GH's PH-down, doesn't take very much to lower it.

I'm still brand new to hydro, but I don't believe PH-up will be necessary... but if someone could clarify that, that would be awesome
Welllll - what are you going to do when you adjust your pH and use too much down and need to get the pH back up? :wtf:

The nutrients we use tend to be acidic, which, of course, lowers pH. If you start with r/o water, or water that has a low pH to begin with because of something in it that is buffering the pH down, the solution pH may be too low and need the up.

PC :smokin: