There is an attraction to the moss. Like stated its really a waste on the ground, most of it will die out pretty fast when you add frogs. The first time you feed the frogs the flies will carry the dusting all over and your moss will start to die out. More leaf litter for sure. You should come up and see what they are talking about with leaf litter in my tanks.I have some leaf litter in there, have a magnolia in my front yard. But I like the green of the moss since I dont have room for many plants, so waiting for the moss to establish before I add too many leaves. I have a micro-mini Sinningia coming yet that will be on top of the chuck of wood in the front left corner as well.
You don't need a 20 for a pair of tincs!D. tinctorius azureus are big frogs, that require a lot of space -- terrestrially -- in order to maneuver around, and have happy, healthy conditions. A 12 x 12 footprint will NEVER be enough room for one of these monster dart frogs, let alone a pair of them. Minus space from the water dish.
I'd just work on growing plants in there, or maybe getting a green tree frog or something to put in there.
Then, when you get a 20 gallon tank or larger...you are ready for D. t. azureus.
Most of my moss on the floor of my viv died out from ff powder dusting but I never thought to ask why. Thanks for the info!it contains calcium. the moss loves acidic conditions and the calcium will raise the ph and kill it. this is why they spread lime over shady lawns to get rid of moss.