one of my leathers has a white edge that is like 2-3" long...the edges of the rest of the leather look normal..the white part is kind of frilly...the surface of that part is a little frayed and is coming off a little.......my other leather has not been opening much lately at all...i know they do that from time to time, but i didn't know if this was related to the other problem...there are no other corals close to the leather..the water is fine....it is about time to replace my bulbs....could this be part of the problem??? is there anything that i could feed this coral???..it is a toadstool leather