I live on Grand Lake St Marys. As much as I hate to admit it, it is a cesspool. We call it Slime Lake or the Muck Hole. Despite that, the water quality has improved quite a bit this year. They have dumped who knows how many hundreds of tons of Alum into the lake and have 4 dredges working all the time. It is improving. The thing to remember though is that it is shallow. Yea, yea Lake Erie is shallow but Grand Lake St Marys is super shallow. It is 13,500 acres and have an average depth of 4 feet. Deepest spot is barely 7 feet. They implemented many new laws for manure applications and filter strips around creeks etc. last year. In my eyes, it has helped. But those new regulations are just here tho and not statewide. To get everyone in the Lake Erie watershed all in line with these practices may be easier said than done. Here's a few pics from a year or 2 ago of Grand Lake. Let's hope the same thing does not happen on Erie. By the way, Grand Lake has alot more walleye than most people think!