homemade "under plant filter" with a exo-terra pump.
no gravel. there is are nine little ceramic filter things siliconed to the bottom to create a ledge for a diy filter plate.
a rug of java moss attached to the filter plate.
just ramshorns, but i might add a couple endlers once the java fills in.
this tank is sort of an experiment in mixing plants with ugfs. in the traditional sense, a ugf is totally unsuitable for plants. but take out the gravel and use a mesh rug of plants and ya have a upf! i think it could catch on. :D