I know I've seen some old posts about cleaning a turtle's shell off because of algae but I know they get like that in the wild. Is it important to clean off algae or is it ok to leave it. Bowser has some algae on his body and his shell and the stock tank walls and gravel are also getting some algae on them. It doesn't seem to bother him at all and the fish seem to enjoy grazing on it but I wanted to see if algae could lead to any possible problems. Thanks for you help