You keep your tank with live plants never any problems with ammonia in the soil?
My frog seems to excrete some waste into the water bowl, which I clean regularly, and some waste onto the green moss. The moss seems to keep the soil clean by absorbing the waste.
I use the "smell test" on the tank to determine when to clean it out. If I get a whiff of anything foul, I pull out all of the moss and rinse it multiple times in hot water. Then I wring it out and put it back.
I also pull out the cork bark section and large branch and clean them with hot water.
I clean the glass on a more frequent basis.
So far the plants are very healthy. I also seem to have a colony of pill bugs (AKA sow bugs or wood lice) along with small earthworms in the soil.
When I set up my tank I started with a layer of rubber mat. I think it's the kind used for a welcome mat, except it has large holes in it. I cut it to fit the floor of the tank. Then I placed a layer of air-conditioning filter material over that. Then a layer of topsoil/coco fiber mix. I then planted some pothos and other tropical plants. Finally I placed a layer of green moss over that.
I then introduced some bugs and worms.
This all drains well and is almost self-sustaining, except for cleaning out the moss and wood.