I would like to put my vote in to the Israeli Carp and KOI for Filamentous Algea (mat algae). I have used this combination for years now, and it works so perfect. My pond is 3/4 acres and I use 15 Israeli Carp and 20 KOI. This amount does not muddy my pond. The bass have keepted the carp from increasing now for eight years. The carp combination has to be one of the best kept secretes around. But you must give them time to grow up big enough to do the job.

As for cattails, mine were getting pretty thick and I thought I was going to have to spray in my chemically free pond when 4 Muskrats came in from nowhere and took them all out. That was about three years ago and I don't know if they will do that again or not.

John