Hi ,I am very new to this frog thing and I know a mantella is not a poison dart frog but I need help and this site seemed promising. I had a single mantellas in a 2 gallon tank with, moist substrate, a piece of driftwood and a potted plant and I have not seen him in 2 days. I was planning on putting him in a paludarium type of enclosure that I am making but I had him in this tank for now. I took the wood out and the plant and he is not there at all. There is no way he could have gotten out because I covered up the two holes in the back of the tank with tape and I always have the lid on tight. Can anyone give me some help please ?