navigate should control them , i don't know about killing them off. you need to check with your fish and game people about restrictions before using. not cheap stuff. i'm sure one of pro's jump in. thats why you need to put them in containers and have control over them and maintain. my friend has pond covered in them, he's having the pond bottom cleaned out to try to get rid of them. lucky it's only bout 1/2 acre and track hoe can do it.

i only wanted to have some fun