Cool! Huge tank for FBT!
I would 't put endless in because they might end up as food for the toads, which I've read about but personally doubt. I mean, endless are fast while toads are slow. Plus, the toxins that the FBT release from their skin is poisonous to fish. You could try it but it might not work long term.
Will you have plants in the water part? If so, what kind? Can't wait to see pics!
My tanks (so far
5.5 gallon Planted Dwarf Puffer tank (2 Dwarf Puffers and a lot of RCS!)
16 Gallon Planted
(GBR pair, 3 amano shrimp and a whole bunch of snails!)