GH 3 part "automatically" adjusts the PH when you start out, say in flowering. As time goes by (a week or two), the PH will go down slowly because the plant uses it up, and you will have to drop a bit of PH-Up into it to bring it back up. I probably do it once or twice between my 2 week change in nutrients.

SN
SpaceNeedle Reviewed by SpaceNeedle on . General Hydro 3 part and ph??? ive been using Advanced 2 part for some time and have many people trying to convince me that the GH flora 3 part is better. So ive given it a try but it seems that the ph flux reacts differently then what I was use to using Advanced. Basicly when Im in veg the ph I set my ph at 5.6 and let it climb just as I was use to doing with AN, but when Im flowering it seems to be dropping, so Im always taking it to 6.1 and letting it descend. This is new to me cause It seemed that with AN is did the same Rating: 5