Just read all 4 pages of the "Muck Eating Bacteria Experiment" seems that aquatic plants grow because they have nutrients (yup, call me captain obvious). So reducing the nutrients or muck will reduce the plants.
Grass Carp would be awesome but they are restricted here in NC. Maybe some Tilapia & Catfish. Also seems like an aeration system would be quite helpful.
Got tied up with home repairs so I brought in a "profesional pond maintenance outfit" They sprayed some Habitat around which seems to have helped a lot. Helped so much we now have a few Heron that stop by for breakfast.
Sadly one of the Heron suffered a stroke or some other malaise so it moved on from hunter to feed stock for another predator.
The warning label on those herbicides scares the daylights out of me. I am 6 years in remission from Lyphoma so a bit more cautious with those warnings.
We use these what we call space suits at work. They r really pretty cheap. We get them by the case. Surely they can be bought just one somewhere. I'm not promoting this product in particular just the style.
I used a granular Navigate product and it was very slow to work and then killed all the water shield in the pond on a temporary basis (I only placed it on one shoreline). The. areas it was placed was mostly wiped out at the root while rest of pond grew back somewhat. It is also an expensive product.
I then tried Polaris and sprayed it in spots where I want to remove it - this is cheaper and easier to control.
I found liming my pond with pelletized lime made the bloom take off and the decreased visibility has put the water shield in check.