I've got a pond (near the new bench/arbor in teh back corner) that's more of a bog -- half filled so there's some 6" depth water and clay for lotus plants, plus some pots of LA irises... the "deeper" part will have a water lilly and maybe a couple gouramis and a betta (no circulation pump/filter, as I don't have electricity out there and don't want the up keep... labyrinth fish can handle lower O2 and warmer summer water, unlike goldfish).
I also have a "bubbler bog" in the other corner with a water reservoir below a layer of rocks & gravel... need to get the pump set up so it has a little waterfall going again.
I top up my "pocket ponds" (including all the 20-24" water garden containers you may have noticed) once a week in the summer, and then I add mosquito bits. It does actually cut down on the number of mosquitoes in the garden -- they think they are breeding, laying eggs in those pots, but it's a dead end. Hah!
Just sayin' that you don't have to rush to decide what to do with it when you get rid of the fish... but you also don't have to keep maintaining the pump and filter, either.
