Hi There I haven't been around for quite some time. We continue to aerate and have been adding bacteria sporadically. The reason being that the bacteria is crushingly expensive. But there is definite improvement as far as muck removal. In our bay, if you do nothing the muck will move in from other areas and make the near shore area completely unusable. So the system is keeping the muck down but is not eliminating it.
Back to the bacteria. I found a company that explains how to build a bacteria breeder at very low cost. It involves a 45 gallon drum, an aquarium heater and an air pump and stone. You take a very small amount of bacteria and some nutrients and let them multiply for a few days before dosing the pond. It is quite late in the season but I want to be set and ready to go in the spring. Sound interesting?