I am looking to introduce live plant into my Tree Frog Terrarium need some advice

[jetoutant]

Ok I have a 12inch by 12inch by 18inch high Zoo Med terrarium.
2 thirds of the base has land and 1 third has water 2.5 inches deep. Water is kept clean with filter wich also keeps the water moving lightly.
I used the Zoo Med hydroballs with some natural rock and Zoo Med Eco Earth Loose Coconut Fiber Substrate for land.
Hydroballs alow water to flow under ground for a natural eco system to develop in the tank and so cleaning is almost kept to very little to none because natural decomposition of fecal mater and urin
Have Exo Terra fake vine and jungle plant for climbing on.
Temp any where between 68 F and 83 F
Humidity any where between 75% and 95%

From the disciption above could any one suggest what kind of live plants or moss I could introduce in to the tank that need little room for root growth but are very hardy plants and where could I get them?

I up loaded some pics of the Tree Frog Terrarium