PH too high Corals Dying

[blennybri]

How can I safely lower my pH in the reef tank? My corals have not been doing great. Ph is at 8.7.
Thanks!

 

[Rocks reef]

Are you dosing anything to raise your Ph?
7.8-8.5 Ph is what most reefers run, you aren't that far off. You could start off by doing a large water change. Is your salt mix higher in Ph?
Are you sure it's your Ph?
What are you other parameters?
How old is the tank?

 

[FMF0331]

That pH is fine, and as a general rule, unless you are using high pH additives such as kalkwasser, pH is never too high on its own.

The only caveat to that might be some contrived situation with poor aeration and lots of photosynthesis.

Randy Holmes Farley posted this on May 19, 2020

 

[Randy Holmes-Farley Verified Community Expert]

Unless you are taking active measures to raise pH, then that value is likely not accurate. Simple aeration will lower it if it is real. I do not think it will hurt corals.