Water Sprite!!!!! My girls absolutely LOVE to sleep and play in their water sprite! It works as both planted and floating, it will actually have a better root system if floated so I suggest that but only if you don't have high light plants underneath it is all.
Don't get any duckweed's, they will take over your tank and are hard to get out. Frog-bit is easier to get out because they're bigger and they look nicer IMHO. That and Dwarf Water lettuce and Red Root floaters.
Leopards: 1:4 Hawkeye, Luna, Astrael, Dorian, Cullen