Thank you very much for the replies, everyone. I'm going to start by trying to manually remove the mats that are floating and then add blue dye to the water. I know it's probably late in the game for this year, but I'd at least like to get the pond looking cleaner than it is right now.

Appreciate the info on the CS Bassmaster, it gives me an idea of what I am looking at. Didn't want to dump too much in and risk screwing things up more, so I probably under-cut it.

Forming my own manual FA removal tool tomorrow. Any recommendations on the most effective way ? Throwing from the shoreline or trolling behind a boat ? Jut curious because of the overall size. I can only reasonably get it from half the shore line, as the other side is thickly tree lined and won't allow for any type of throw.