Hi,

your tank looks nice, but its not optimized for this species. Maybe thats why they do not eat.
They need a tall setup. About at least 3 ft for juvies, because they sit mosdt of teh time in a vertically orientated position. For that they also need lots of branches of about the thickness of their body.
Also I think, that water bassin is way too small. Its better to have sth in, which allows them to dive.

Best regards

Ingo