My poor fish are in a quarantine tank being treated for both capillaria and camellanus worms using levamisole which seems to be doing the trick for them. I am clearing their normal home now, having nuked it once more with levamisole which doesn't "do" snails or capillaria eggs and figured I might as well nuke them while I am at it. I have fenbendazole here which is supposed to be added to food. No fish in that tank so no food. Will dumping it straight into the water wipe out the pests regardless of their life cycle stage? The tank is also planted if that needs to be considered.