Tried shiners, but they were just expensive fish food. They don't survive long enough to maintain a population.
I need something where the adults are too large for the bass to eat, but make a lot of juveniles.
But thanks for the reply
The Gizzard Shad will do what you are wanting to do, but since the adults can grow very quickly to a size that the bass cannot eat, relatively quickly you will have a pond with more Gizzard Shad biomass than any other species of fish. I would NOT recommend stocking them. Their number can be controlled with a light dose of Rotenone that will only affect them, but I still wouldn't stock them.
Have habitat for the shiners to reproduce on, habitat to help hide in, and stock a lot of them.
The bloom is there not only because of the Nitrogen (N) but because of the Phosphorous (P). You could use some of the P strippers out there, and that will help limit the amount of phytoplankton bloom.