I do not understand what you mean by up and down, what i will tell you is i would not keep adding things to raise or lower the ph level non stop it couldn't be good for the plant, you have not mentioned weather you checked it now, When you added whatever you added to stabilize your ph level. For hyrdo it is much lower, i think 5.5-6.0 or something like that, have it 6-7 and you will be fine.