Thank you Turtulas-Len! Yes, I they have everything they need, and don't seem stressed at all, so I was not wanting to make that change just because one guy who says he's an expert says so!!
I have been using a very large Tupperware semi-clear bin for my smaller turtles. I went to a reptile show this weekend and a vendor said it’s best to use a habitat with black or dark sides because the turtles feel safer. Then a woman said no, that’s she has been using clear-sided for 10 years...