Got a 30 gal freshie here with an overhead filter/light. Nothing all that interesting these days just 3 silver colored tetras (although the old one is about twice the size he's supposed to be), a red tailed shark, algae eater, one regular catfish and an upsidedown catfish (who hides all the time in the tall stump you see in the pic). I've been meaning to buy a couple more. Maybe another catfish or something that grows a bit bigger than 4". My dream tank (when I get a place of my own to put it in) will be about 150 gal and will contain at least one small mouth bass .
Haven't snapped a photo in a while, but here it is not long after I got it many-a-year ago. I like to make it look like a slice right out of a local pond. :D