I have floaters too. In one pond of about 1/4 acre, I saw about 20 last weekend. They ranged in size from one inch to 4 inches. In a 1.5 acre pond, I saw a dead 3 inch and a dying 7 inch. All bluegills and no obvious disease signs. Cool, overcast weather.
I'm not sure it isn't my fault. I fertilized the 1/4 acre pond with some one year old liquid ag fertilizer. It had never been fertilized before. The water was the color of weak tea and yet I didn't get a bloom. I assume the stuff had gone bad. I sprayed about 1/2 gallon in the 1.5 acre pond. In both ponds, I am still loaded with bluegills. However, I am concerned. I only get there on weekends so can't do any kind of daily evaluation. I assumed the fertilizer could have lost its srength but didn't think about it getting toxic. Where in the dickens is North Zulch, Texas?