I cleaned my red eared sliders water last night. Last night, I was inspecting the blind RES's shell and he had 2 red sores and these white spots that concaved in. I cleaned him again and dried him off. I put some iodione on his shell. This morning, I woke up and he had diarraha and he had some blood smeared on the bottom of the bucket and on some rocks. My other red eared slider, has these spots on her shell near her right rear lef that looks like shell rot. I've been treating her too. She also has this blood spot on her neck. What is wrong with my turtles?