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What can I add to my sum tp clean it up. I'm getting this left over food looking stuff in it. I know it's not food because I havnt fed in over two weeks but I was wondering If I could add a few hemits etc. to help with the clean up.
IMO, the best thing to do is a water change in your sump. Shut down the system, take out the biomedia and dump the sump. Incoorperate this into your water change schedule and clean it every few months.