Kill unusable-fish with high effect, no toxic residue Cleaning pond with no ... Pond in Aquaculture; killing snail, various wild fishes , the unusable-fish,loach, spawns of frogs, tadpoles, earthworms, leech, nematodes, other aquicolous ... . Application:1. Eliminate the unwanted or wild fishes in the fish ponds and shrimp ponds; 2. Help shrimps take off shell ...