well sorry to say this but your water in the bottom of the tank is more than likely going to stagnate. which means non-moving water= VERY smelly. ive built terrariums and they need some sort of water movement, or very good drainage. ive only seen a few that can make a tank work with no moving water. other wise you could add some frogs red eye, whites, you could even get a pair of darts or mantellas. but if you go the frog route i would suggest covering most of the top screen with plexi otherwise you will lose out on humidity. they need around 80%+++