Was it white wghen you bought him? Is it expelling himself? <--- if so get him out, not sure what all is up did it attach before and wont now? i did alot of investigating about them cause my long wouldnt attach to any thing but he has now , but in my findings it says if they start releasing from there holding spot it means there not happy, check your water and salinity should be 1.025 and what kind of lighting is he under