So my grandma's turtle has been growing up in a standard fish tank for its whole life (since it was young) with little water. It used to swim when it was little, but still not a lot. They kept very little water in the tank (I was too young myself to remember the details) but I suspect because of the levels that the water didn't have a filtration system. My grandma just moved in with us and has been keeping the turtle in a 2-foot tub, replacing water when visually needed and a brick for it to stand on. We don't clean him so I think the dry white stuff is just deposit from hard water. He's shedding on his underside. We keep him in the laundry room so there's a small window, but little to no natural light.
Pretty much, I'm surprised it's not dead yet (although I've heard it's a pretty hardy animal). As far as I can tell, the turtle seems pretty healthy other than the fact that he can't swim and doesn't walk very well. His shell isn't soft, he doesn't wheeze or anything or seem to have irregular breathing. He has no runny nose or rashy skin.
I've let him out for a walk right now in my living room. Now that I'm able to, I'd really like to help my turtle live a more normal life. However, I'm afraid that throwing too many lifestyle changes can shock him. Is this possible? And how can I start changing his lifestyle for the better?
The question sheet:
How big is your turtle? 7 in
How long have you had it? approx 20 years
What is the water temperature? N/A (tap water)
Did you use a thermometer? no
Are you using a water heater? no
How much water is in there? 1 in
Are you using a water conditioner? no
Are you using any filtration? no
What is the basking temperature? N/A
Is there a basking light? no
Is there a basking platform that is easy to climb on? yes
What kind is it or what is it made out of? one brick
Is there a UVB light? no
What have you been trying to feed it? aquatic turtle food with added vitamins and minerals (from the pet store)
When was the last time your turtle ate? this morning
How big is the tank/pond/enclosure? 2 sq ft
Is the tank near a window? no
Is the tank in a room with a lot of activity? no (laundry room)
Have you read the Basic Care section? yes
Have you searched the forums for similar situations? yes
Is there any other unusual activity/symptoms? can't swim or walk well

