They usually melt, which is saddening. I had 32 wats reef light and I've added another light hoping it could help somewhat; I also dose Cheatogro which has been helpful.
My tank is low tech 126liter ≈ 30 gallon
2 clownfish
1 Bangai Cardinal
1 watchman goby
2 hermit crabs
7 snails
Any help and tips would be greatly appreciated
