My yellow tang has started to nip at the silicone in the corners of my tank. He his well fed, receiving 2 feedings a day. I feed him a variety of food such as spectrum pellets, formula 2, mysis shrimp, ocean nutrition spirulina formula and he grazes on the algae on my live rock. Is this a harmless action? Or will he actually be able to rip of the silicone and cause a leak?