I think Cecil Baird has used cottonseed meal in addition to fertilizer. Let's see if he responds. In the post below, BGkiller jogged my memory. I didn't go back and read the history. I just responded to the current 2012 posts. Here is CB1's comment about cottonseed meal.
I used cottonseed meal, but it left the pond a brown color, which made it hard to determine if I was looking at an algae bloom or the cottonseed meal decomposing was staining the water.
IMO the organic fertilizers at least some of them, produce more protozoans and zooplankton type stuff and not green water -phytoplankton - blooms. The fish feed directly on the animals and a lot of the green water portion is bypassed. There are probably some published studies on this topic.
