Yep heat tape from incubator warehouse.
Poly hides are dry, the geckos seem to like basking under that, the container next to them is full of sphagnum moss and is where they are currently brumating.
I don't use mealworms. Had nothing but trouble when use to feed them to beardies.
Crickets 2-3times a week when active. So far so good.
p.s for young geckos I'll probably use the smaller tubs down the bottom. Same principles though.