Aquatic Turtles Pale? Can I put them in a dry tank?

Your turtle needs a baskin. It's skin is turning white because it's needs aren't being fulfilled. Turtles need a dry hot spot of 88 to 92 F and water can be room temp as long as it doesn't get really cold, 70 to 78 is fine. Turtles need to go back and forth between warm and cold so they can keep their body temp where it needs to be. Not giving your turtle a baskin will lead to illness and already is with one. Putting them in the dry tank with rocks does not fulfill their need to get warm and the need for dryness is only secondary. You do not need to get a special tank. Turtle docks aren't that expensive, but you need a light too. I always use hardware cloth from home depot and mold it into a tank topper then I wire a brooder light or clamp light (minus the clamp) to it after drilling a few holes near the edge of the hood. Twist ties work fine to attach it. Sliders don't walk around on the ground in the wild (except females to nest) they bask right over or at the edge of the water, then slide in quickly if approached. Males get long claws and risk injury if walking around on rocks. Don't make a baskin from the dry tank. Turtles are very efficient at absorbing heat. You will cook them. They must be able to dive into cool water after reaching a maximum internal temperature. There is no clever way around a turtles need for a baskin in their aquatic environment. Sorry.