Quote Originally Posted by psteve
Uh...
Was I supposed to drink the 7-up, and put the PH-up in the res?
7 is neutral pH, and 7-up is a pH buffer.
Unfortunately you REALLY want your pH in the 5.5-6.7 range whilst growing hydroponically.
You can get around this problem if you mix 7-up and 5 alive they average to a pH of 6 and that should be fine for your purposes.