Ffgregston

So I have a 7-8 acre pond that I have been managing for largemouth. It has very limited coverage and gets green with algae every year. I was wanting to get some coverage on it, but don’t want to worry about vegetation taking it over. I was thinking of making some homemade lily pads out of plastic or some kind and anchoring them out. Is there anyone that has any experience in this or know someone that sells them?