I agree. Folks too often keep the temps a little too high for sliders (even some of the caresheets out there list temps that are up there a bit). Sliders function well in cooler temps. Water temps in the mid to upper 70's are fine and even basking temps of 83 or a bit higher are fine for them. LOL!! Mine are out in my pond right now (from 2.5 inch babies to 11 inch adults) basking in an air temp of 62 degrees and have a water temp that is actually ten degrees colder.
NOTE: They are conditioned to living outside and hibernating during the Winter. At this point they are starting to refuse food and their digestive tract is cleaning out in preparation for the long Winter hibernation underwater (as soon as the temperatures dip into the 40's.)
I am not suggesting to anyone that these are temperatures that sliders living indoors should be kept at. At these temperatures long term indoors they would most certainly become ill or even starve to death because they would most likely give up eating. --I know that did not need to be said BUT I just thought I would mention it to any newbies slider owners.
Steve