I got two aquaclear 110's in my 180 and they have an infestation of worms in them, im guessing from overfeeding but i do weekly water changes and vaccum the gravel real well so i dont know where they came from? they dont seem to be harming the fish at all, but i dont want them their cuz it freaks me out lol. is their something i can treat the water with to eliminate them or do i just need to buy new filters?