Hey guys, just wanted to ask if anyone knows or had an experience about the wrinkle on the body of my stingray? I notice my male BD is getting fatter than before. Is it because of he gets fat or he has a skin problem? Its been 2-3 days since i noticed a wrinkle on his body. My water params 0 ammonia, 0 nitrite, <10 nitrate. Do 30% wc every 3-4 days and use seachem prime every wc cause i use tap water. Thanks