I tested my 55g today, results as follows:

PH- 8.7
DKH- 9
SG- 1.021
Calcium- 440

Will the PH being that high cause any major problems, and if so, how can it be ajusted without throwing everything else off? I have a PH monitor, and double checked it with a manual test kit. Any tips/suggestions are welcome. Thank in advance.

TS