I'm experiencing major PH issues. I try-ed to drop it down with powder and have not had the chance to try the liquid form yet.

I Have 2 Water Farm 8 Packs. I had all 16 set up and I dropped down to 12 I originally set things up @ 5.8 "THE PERFECT PH LEVEL"
Then I read a bunch of posts on PH and hydro. It went on to say that PH years back was measured with fish tank testers and there was nothing even close to accurate to check PH. For the People who were even trying to check PH always said "5.8 IS THE PERFECT PH" Well to try to get my PH somewhat balanced I went to each pail dropping them as low as 3.8 and as high as 4.3. Two House later they read 5.5 5.8 and the next day 6.0 to 6.7. On all the new readings on PH I have read state that when the PH goes above 6.5 the plants uptake diminishes and lower then 4.0 is the same. So I keep my rez now @ 3.8 and will try to balance out into the future to use the PH in the Rez to stabilize out the system Till I convert it to recirculate which I put in a big order hose valves ect....

Plants are now happy when I was setting it to 5.8 2 Hrs later it was 6.3 6.5 and the plants were all flat not in good shape. I will be posting that thread on PH check it out I will through up a link...