Last year in my trout pond I had Prolific filamentous algae along the edges for about a month in Spring that I continuously scooped out with a net once clumps floated free to the surface. At some point into early summer the filamentous algae disappeared, and I believe it was largely replaced by suspended algae and primarily chara and some small pond weed.

Anyone else have this happen? I'm assuming this is because the other aquatic plants became dominant and starved the filamentous algae for nutrients? And/or water temps played a part and cooler temps were more condusive to the filamentous algae I have?

I did add bacteria last year which may or may not have been a factor. However this year I will forego the bacteria, as I just can't justify the cost, and want to see if this phenomemon occurs again without the bacteria. I also aerate with a bottom diffuser in this small 1/10 acrea pond and flow throug well water at 38 gpms. Pond is 9 feet deep in the center. I harvested over 500 pounds of trout from the pond last year before draining and refilling.

Of course the chara is coming back, but so far the one I really don't want-- the small pond weed-has not been seen.)(fingers crossed)

Any thoughts? Anyone else observe filamentous algae disappear at a certain time of year?

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.