i noticed today that there were little flakes of what looks like skin in my tank. I have a pair of RTGG and an inc. shark in a 40gal. has anyone had this problem before? do inc. sharks shed? i've never noticed the RTGG i've had before shedding. acutally, i'm not even sure it's skin, it just looks like it, kinda like when a snake sheds, it's all over the place and i'm not sure where it is comming from.