Hello Ferguscyc,

Welcome to the forum . You have beautiful frogs and what a nice sketch!

Bill has every so kindly answered your questions well . Thanks, Bill!

The water filter will help. You should still do water exchanges as you would with any fish tank to keep the waste in balance. Bill's idea of lava rock or another porous rock will allow beneficial bacteria to function through the waterfall as a biological filter . Be sure to leave an access area to be able to reach your filter in case you need to service it.

Fish are okay so long as you do not use goldfish or other fish that tend to carry goldfish. I once housed a make betta in my pond.

The false bottom is a layered bottom to keep land elevated away from water. This is to avoid a swamp-like bog in which most plants will die in. It's basically used to create elevated land. We can teach you how.

Plants:

Some great plants for red eyes tree frogs are any in these categories:

Chinese evergreens (Aglaonema)

Pothos (Epipremnum aureum)

Philodendrons

Peace Lily (Spathiphyllum)

Calathea