Mike, I had a terrible growth of widgeon grass in my 6 acre pond. It was sprouting everywhere in water 6 feet or shallower. I applied for 20 grass carp from the state of Texas and was approved. I bought those fish when they were 12 inches long two years ago this summer for $10 apiece. They are all about 20 inches long and about 10-15 pounds now. They do a great job on widgeon grass but that is a rooted grass growing on the bottom. They do not eat algae that I can tell... maybe if they were starving! I see some cat tails uprooted this spring and suspect that they are doing it because there is no emergent bottom vetegation yet. I like mine and would recommend them for certain types of vegetation control.
Tom Sterling (Shelby County).