I've been trying to keep my ph at 7.2, due to my high TA (>200), to try and prevent scaling of the SWG plates. To do this I have been adding acid every day or every other day to drop it from around 7.5. My question is since I am going out of town for a few days would it be harmful to drop it to say 6.8 and let it climb back up while i'm out of town?