corals rely on different things to survive/thrive - such as good lighting and flow. they need calcium to grow (stonies) but I find the rest of the water parameters are more for the fish.
if you have only had the tank running for 5 months then you still have new tank syndrome - even though you filled it with stuff from your other tank. Same problem I had.
your temp is too high and your salinity needs to be consistently close to 1.024. Your alk also needs to come way up.
work on these parameters and don't add anything new for a couple of months. then try a couple cheap fish and see how they do.
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