Thought I would post and update with what I've done and results.
1. Purchased some Aquathol K and used the liquid form on 1/3 of pond edge 5-6' from shore.
2. manually removed the sago pondweed that seemed to hold nutrients for FA rebloom.
The results are very good. No FA rebloom and the sago pondweed removal much easier I believe due to the root system being weakened by the Aquathol K. I removed approximately 90% of the sago pondweed, left some for the smaller fish to hide in from the predators so they can continue to re-populate.
