You should try to keep your salinity a tad more stable. Try topping up twice a day.
Has the coralline spread to your glass yet? Personally, I don't like to add corals until there is quarter-sized patches of coralline growing on the glass which indicates the tank is "settling in".
You didn't mention anything about your parameters... pH, Ammonia, Nitrite, Nitrate, Calcium, Alkalinity, Phosphate, etc.