I was using tapwater that sat out for 24 hours and gh three part. I was having so many probs and I was also using rockwoll, with the ph always going up. So I switched from regualr gh micro to hardwater micro and I had no more problems. I forgot to tell you that. That gh three part with the hardwater micro let me finsih that grow no problem. It has ph buffers for tapwater that are insane!
you never metion your nutes, do you? That is the problem. We need to talk about that def. I will try and help. Hydro worked for me ok, in fact. Just only had one trun put female in four in rockwool! dIsapointoing as you can imagine, lol.