Have you tried artificial silk plants as hide spots? The turtle gets to rearrange his tank a bit with them, they look nice, and they don't take up room like other hide areas.

Katrina
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1.2 Eastern Muds - Fred, Ethel, Edith
0.1 Iguana - Tiffel
0.1 Bearded Dragon - Foster
Foster turtles: More than I'd like the husband to know about.