Don't the bluegill fry and plankton make use of the bloom?
I added 70lbs of shiners to my slightly less than 2 ac pond last year and not many survived to breed. That said I think I may be seeing a few surviors now tho they may just be large fathead minnows. Suprisingly the fathead minnows seem to have become well established.
The shiners may have been consumed over the winter by any bass in the pond. If you can stock some more in the next few weeks, and you have grassy areas that are in less than 24" of water they might pull off a spawn this Spring if you can get shiners 3"-4" in length.
