I have a 26gal bowfront with excellent levels (8.2pH, 0-.25 nitrites, .25 ammonia, 60-80 nitrates). I've lost a purple doppleback, aarow crab, and 2 peppermint shrimp. the only thing that has changed is the pH. it has gone down to 8 and up to around 8.4, but that is the only thing (besides...