Brian, IN GENERAL, all vegetation, especially ponds, need 3 things. Sunlight, temperature and nutrients. Cut off one of the three and vegetation can't make it. We can't do much about temps. Some people use pond dyes to cut off light penetration and it does eliminate weeds. However, it also clobbers microscopic plants (phytoplankton) that are the base of the food chain. That ain't good.

So, we are left with nutrients to figure out. That usually comes from pond fertilizers, runoff from livestock or fertilized fields, or fish manure overload.

However, some years like last year, seem to generate a huge amount of algaes in certain geographic areas. That's the tough one when you really can't figure out just what was different this year.

It's not about the fish. It's about the pond. Take care of the pond and the fish will be fine. PB subscriber since before it was in color.

Without a sense of urgency, Nothing ever gets done.

Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley Rancher and Farmer Muleshoe Texas 1892-1985 RIP Grandpa