I started dropping tums in the tank yesterday and I'm not expecting them to work overnight (I even took him out and put him in a dish wish about an inch of water and some tums to make sure the algae eater wasn't running him off them) but he looks worse! He's peeling and there's a lot of discoloration...some light spots and some dark spots that appear to be inside the shell so I'm worried he might have some kind of infection? Or is it just calcium deficiency?
I plan on getting him a cuddle bone tomorrow to see if that helps any too
Edit: Oh an I keep water temp at about 78-80 degrees but I don't know Ph, Kh, etc...need to invest in something to test this...and I do a 25% water change once a week...he eats algae wafers and whatever else he finds to munch in the tank