With spring around the corner I'm starting to map out plans for the yard and one idea I'm toying with is a patio pond and if there is a pond I want to sneak some fish into it. I would prefer a light enough bioload that plants can be the sole source of filtration. In winter I can move the set-up to my garage and use a sponge filter. My garage is semi-insulated and attached so it rarely dips below freezing, I believe maintaining a temp in the 50s is very realistic. I have sevs, geos, heckellii, angels and a belly crawler so i'd like to go into a new direction. For some reason carpintis pop out as something I've heard would work. I'm in the Chicago and want to know what you goes have kept in a similar fashion.