Who Gives A Fish Forums

I've had my 13.5 gallon saltwater tank up and running since June, and it's been doing great so far. I've got two small Ocelaris Clownfish, three blue leg hermit crabs, and two trochus snails in there, all of which are very active. I test and change the water weekly to keep everything healthy.

I ...

I agree, it's a classic case of polyp bailout. Too much flow or a lack of essential nutrients like cal, mg, or alk can cause it, and pH imbalance is another possibility. What dusked6 said about your SG being low also rings true, 1.026 is a better target for LPS.