How big is your turtle? 8 inches long 5 inches wide
How long have you had it? 25 years
What is the water temperature? 74-80
Did you use a thermometer? Yes
Are you using a water heater? Not now
How much water is in there? 25 gallons
Are you using a water conditioner? Sulfur block Dr turtle
Are you using any filtration? 2 cascade pumps
What is the basking temperature? N/A
Is there a basking light? No, never. Just sun.
Is there a basking platform that is easy to climb on? Yes
What kind is it or what is it made out of? Styrofoam
Is there a UVB light? No
What have you been trying to feed it? Reptomin pellets
When was the last time your turtle ate? 3 days ago
How big is the tank/pond/enclosure? 55 gallon
Is the tank near a window? Yes
Is the tank in a room with a lot of activity? No
Have you read the Basic Care section? Yes
Have you searched the forums for similar situations? Yes
Is there any other unusual activity/symptoms? He's turning red. Not his shell just skin. We moved 4 months ago so water source has changed. I just noticed the spots on his tail and pull him out when I noticed the rest.

