I am intending to try a few more plants to see if I can find the right combo for the terrarium, the climate needed and the mantella's interest level.

Yeah, their eating habits are a bit unusual according to the norms. I am happy to see that they munch on the grubs but I am not certain if they are too fatty or not enough nutrition for them. If they are wild caught, which at present I am lead to believe they are, then they should eat whatever I would think as no preferential training has been in place regarding their diet.

lol I do indeed find the burrowing interesting. I also had a small coconut hut in there but that was ignored. I made a few small caves out of slate but that too was ignored. They seemed to prefer moss and leaf debris so moss and leaf debris it will be.

I have ordered two more mantellas which I am hoping will arrive within the next week or so. The pet store that I got the first two at indicated that they weren't available but they were tracking some down. I may try breeding springtails and introducing that into their diet as well.