I just recently aquired a 55 gallon aquarium. Has a skilter 400, 55lbs of live rock. I have a tomato clown, 2 domino dansles and my ph is at 7.2... i am confused at why my fish are not dead seeing as the ph needs to b at 8.3 anyways.. i have a Ph booster to an 8.3 but it does not tell me how...