What if they get in his sump and continue to breed.... Or what if there are a ton in there and they do die they would be big producers of nitrate hidden in scrubbies and bio ballsWill Hayward;3042044; said:Just put in some cheap fish and see if the fish eat them. Then use those fish for cycling, and if you see any signs of any infection during the 6 weeks you're waiting for the filter to cycle, treat them with meds.