Higher PH

[MT_is_a_Pisces]

What is the results of running a marine aquarium with pH between 8.4-8 6?
Any negative affects?

My 90 gallon is in a room about the size of a small office. The room doesn't have daily activity and there a small amount of fresh entering where the window will not seal completely.

 

[GoVols]

What is the Acceptable pH Range for Reef Aquaria?

The acceptable pH range for reef aquaria is an opinion rather than a clearly defined fact, and will certainly vary based on who is providing the opinion. This range may also be quite different from the "optimal" range. Justifying what is optimal, however, is much more problematic than justifying that which is simply acceptable. As a goal, I'd suggest that the pH of natural seawater, about 8.2, is appropriate, but reef aquaria can clearly operate in a wider range of pH values with varying degrees of success. In my opinion, the pH range from 7.8 to 8.5 is an acceptable range for reef aquaria

http://reefkeeping.com/issues/2005-03/rhf/