Originally Posted by
myers
http:///forum/post/3194601
I am switching from a 55 gallon to 125 gallon have had the 125 gallon up and running for about 2 weeks went to check water conditions and everything was testing good except for ph it's at 7.4 What would make the ph drop if a week ago I checked water conditions and it was at 8.2?
The PH drops from using RO water...buffer the top off water with an alkalinity buffer and it will stabilize the PH.
I can't explain the why, but I know this works...do not dose unless you have tests to keep track of everything.