So this morning my daughter asks me why our angel fish is breathing funny. Sure enough his lips are extended and he's breathing really rapidly. He's also hiding under a rock which it never does. One of my clowns is exhibiting the same behavior but still ate. My other clown and royal gramma seem to acting normally. My cleaner shrimp didn't really eat this morning either, and seem to be a little pale. (this usually happens before it sheds though so might just be coincidental) Everything else seems ok, corals and anenome seem fine. I checked the water param's and nitrates, nitritate and ammonia are all very low the PH was also low at 7.8 but I can never get it much higher than that anyway. I don't know what else to check the water for to see what the problem might be. Any suggestions?