My turtle has white filmy stuff on his shell and I can't tell if its fungus, mineral deposits, shell rot, or shedding. Its shiny and reflective in the water. But when I take him out, and it dries, it looks a little like dry cracked skin on a human would, except its a shell. Reminds me of a callous.
Possible contributing factors:
He is about six inches and always begs for food. I gave him a lot of protein before I realized that overfeeding is a thing and growing too fast is also.
His tank might be too small with an inadequate filter. It holds twenty gallons, and I fill it up well so he has more room to swim around. But it gets murky really fast.
He sheds every time that I get new water, which I did just yesterday. I wonder if he's over shedding?
I put a lot of water conditioner in his tank, and the food, with added minerals, may have dissolved in the water. Algae grows so fast in there! Could that be a factor of !mineral deposits?
I also inserted some beneficial bacteria into the tank, to help break down waste and debris. Maybe the bacteria isn't so beneficial after all.
I though about strengthening his shell, by giving him more calcium. Was I supposed to leave the banquet block in there?
Ever time I go to turn off the light to create his night cycle, he is basking. First of all, where in a turtles schedule is basking usually? Perhaps his sleep schedule is off. I believe he's been lacking UVB, because I turn off the light at night while he's basking. Should I leave it on? Or can he sleep anyways?