Okay, right now 7 of them are in a 10 gallon tank. They are crowded and I will be moving up to a 20 gallon as soon as I can.

I want to make a section of it full water with rocks and twigs, I am thinking an 8 inches long and 8 inches deep, possibly larger. I know how to do this, silicone a piece of glass inside to secure it. PCF will lay eggs in 6 inches of water so I figured that was a good size to start with and gives me enough room to add some small rocks and twigs.

I currently have coconut coir for a substrate mixed with worm castings. The frogs don't mind it but it sticks them and makes a mess out of their mall water dish.

The tank is planted with 3 species of Peperomia, I have a 2 inch Hydroton under layer with widow screen for a substrate barrier. The plants are thriving and outgrowing the tank even though I was told that Peperomia only get 8-10 inches tall. Well the ones not in the tank are over 16 inches tall. I have to trim them often in the tank.

I want to stick with what has worked, but I want to make the bottom more frog friendly. I have thought about moss but I do not know how much competition there would be for nutrients with the Peperomia. I doubt it will be an issue but I had to ask. The frogs love the Peperomia though I think I will remove the smaller species because they really break it up and have it laying down instead of standing up now.

Is there a moss that will tolerate room temps of 72F and not a lot of light? I have a full spectrum compact fluorescent over the tank now and plan on putting a higher watt bulb over the new enclosure when I get it set up. As far as a filter, will one of those sponge filters work to provide filtration, circulation and bacterial surface area?

How thick do I need the Hydroton layer to be? Is 2 inches about right or can I go shallower for more plant growth room? I have never seen any water accumulate in the bottom.

I honestly have read tons of articles on here and everywhere else, these few questions are the ones I have not been able to find solid answers to.