This rock flower has moved, has refused food for about 10 days and the middle is poking out. If I touch it then it will go flat and look normal but eventually pokes out again. Parameters are all normal, no fish, crab or shrimp in the tank. There are two other rock flowers nearby that are fine. This tank is 3 years old with two clams, hammer, frogspawn, trumpet, zoas, birds nest, Duncan, gonipora, pulse, green star polyps, cerith and nassarius snails. Any ideas?
