First photo had less water in tank to me. Second full view water level is good but ramp is concaved . Maybe just something to brace it so it doesn't move down when he gets on it ?
What type bulbs used , looks very bright on basking area ? (90* is good if thermometer used is accurate) ? A larger basking would be better ( one that has several temp ranges so he can pick the best spot he want's ) or move fixture a little to one corner of it so to offer a cooler area if he just wants to dry off without heating up.
[I'll try out that powder ] ??? this is the wheat germ I'm talking about :
https://www.amazon.com/gp/product/B0002 ... UTF8&psc=1The cuttlebone make sure you are removing the backing on it , turtles have trouble digesting the backing part. Use search box to read up on how to remove it on forum or google for images/videos .