can anyone help I do not know what is going on my new 125 gallon aquarium set has been for 6 months 3 175 mh skimmer and 125 pounds of live rock ammonia is 0 ph is 8.3 nirtate 0 nitrite o salinity 1.24 calcium is 420 ppm alkanity is low aquarium coral are growing great but my fish coral beauty and hippo tang are always getting white spots (ich) 2 clowns and yellow tang are fine don't know what to do any help this is my 2nd hippo first one already killed over. I have dosing with oceans blend 2part solution. READY TO PULL MY HAIR PUT :mad2: