Thanks everyone for the compliments!
Here are the answers to the most common questions-
Do Poison dart frogs become food? not really-poison dart frogs don't actually swim(but they can). Since they are completely terrestrial-the 2 never mix. If by chance one was eaten it wouldn't hurt the fish. Poison dart frogs loose their toxicity in captivity. To date no frogs have never been eaten.
How do elevate the land? I build a shelf out of PVC and eggcrate. I hide the supports many ways, rocks,driftwood, styrofoam mixed with cocofiber etc etc.