Other than to advise not changing the salinity more than a point or two at a time, I got nothing. that could be why your coral isnt opening....how do you test your salinity? Refractometer or a swing arm? You can get the most accurate reading from a refractrometer for about $30 off ebay. My swing arm was off at least 4-5 pts.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.