UV will only sterilize free floating. It can't and won't kill the Eggs that have been deposited in the substrate already.
Hypo would be my recommendations, as it won't harm the fish, and doesn't use meds. But, if you have Corals go another route. That fishy needs fattened up some. I'd feed that poor boy twice a day until he gets some meat on his bones.
Hypo would be my recommendations, as it won't harm the fish, and doesn't use meds. But, if you have Corals go another route. That fishy needs fattened up some. I'd feed that poor boy twice a day until he gets some meat on his bones.