I purchased a Magnum HOT 250 w/ micron cartridge and some diatom powder to clear mine up. I still use it whenever I stir up the substrate or just to make to water sparkle. It is a great utility/maintenance filter.
Fill your tank with floating plants that will both absorb nutrients and block some of your light. That's how I'm currently dealing with my latest outbreak, thanks to the bulb on my UV sterilizer being burned out.