Tested ph yesterday and it was close to 8, tested it today and it was close to 7, what could cause this?


Jul 9, 2020
Apex, NC
I added some soda ash to increase it just now, will test again in a few hours. Is it normal to see such drastic changes day to day?

I did add some nophos yesterday (I know I shouldnt care that much about high phosphates,but had already bought it), can that lower ph?


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
No. The only way pH drops is due to chemical addition.

Try to not use chemicals to raise your pH level. Aeration will do it naturally.