Ive got some sunny d's that will not open fully during the day, nor do they have the color they used to. Ive moved them around in the tank, checking for flow, moved them up and down to see if more or less lights would help. Ive dipped them in coralrx, and still no luck. All this over a timespan of 3 weeks. I see tiny white spots on them, and was wondering if this is possibly zoa pox? I made sure it isnt sand on them. Water parameters are 1.026 sg, 1400 mg, 440 Ca, 9.4 KH, 0-5 nitrate, 0 phos, ph 8.15 Im stumped. They used to look really good. My t5 bulbs are 7 months old. Thanks!