So my boss has two turtles, and one of them is not doing well. He has gotten very lathargic and drags some of his limbs. (I repeating what he told me this morning). He apparently just lies on the bottom of the tank. My boss was asking me if he should take him to a vet or what. I don't know much about turtles. I've been trying to get my boss to upgrade to a bigger tank, and stop using ditilled water. I know that both of the turtles have shell rot. So, what should I suggest to him? Hopefully he'll start listening to me.