I have a skippy filter that was over flowing . the shower outlet for the tub was clogged with tiny worms. I cleaned it off 2 hours later clogged again ,I removed the stainless covers from the outlet , no clogging now . the worms are very small brown in color 1/8 to 1/4 inch long pencil line thick ? no clue what they are I hope they do not hurt fish. any ideas what they are ???