Ph low

[Randy Holmes-Farley]

Yes, stop using other carbon.

 

[Alwmh4]

Water level is dropping in my tank. Ph is good at 8.2. Do I just use RO water? I probably need to add 6-8 cups of water (17 ga tank)

 

[Randy Holmes-Farley]

Yes, use pure fresh water (such as RO/DI) for evaporation replacement.