We deal with the same thing up north. Bad thing up here is the DEQ / DNR rely on the Weed Control Companies to be the Experts in Weed Control If the companies aren't spraying they aren't making any money. Lakes up here are sprayed once a month from Ice Out until Fall. Usually they are Killing Dead Weeds Lake front owners don't like weeds and could care less about fish and fishermen. Hoping you are able to do something about it.