venzi Posted August 31, 2022 Share Posted August 31, 2022 (edited) Hi. I just tested my 20H tank water for PH and found it to be 8.2. My tap water is at 7.6. What can cause the PH to increase by this much? Water temp is around 76F. I just have gravel in there (no coral or anything). I have good flow in the tank (around 100 gph) that's aerating the water at the surface via water turbulence. I read that highly oxygenated water can raise PH, but it can raise it by this much? edit: assuming the PH elevation is due to oxygenation, would the PH go down a little if I were to reduce the flow to like 30gph? How long would I have to wait before measuring the PH (like when would it reach equilibrium)? Edited August 31, 2022 by venzi Link to comment Share on other sites More sharing options...
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