You can make it a really nice water garden pond w/ lots of nice plants and throw in a few small fish to eat up the skeeters. They are fun to watch too :goldfish:
I don't have a filter in my pond right now. It's 2500 gal w/ about 30 or so goldfish in it, lots of plants, a waterfall and I do partial water changes now and then along w/ the rain that does it for free here often. Also skim the bottom w/ a net now and then to remove some of the debris that builds up. I have clear water and fish looking good. We have pretty mild weather here w/ not a lot of sun so that could help w/ keeping the algae at bay also. Pot my plants in kitty litter and growing good, feed fish sparingly and try to control the heron w/ wire fencing, windchimes, loud talk radio and cat that loves to chase the bird!