Feed or organic fertilizer. Its all organic fertilizer except that at equal weights ... a feed will put much more nitrogen and phosphorus into the pond. Eventually you will have fed enough of the feed to be nitrogen equivalent to 50 lbs of alfalfa for example. This will occur with A 40% feed when you have fed around 22.5 lbs of feed. The major difference will be that the feed wastes will have a very low C/N which means that it will be more stable. This means it will be more like muck will not produce as good a bloom. The higher C/N ratios of organics puts a lot of energy into the pond which is good for zooplankton and phytoplankton as well. Anyways, nice to hear that your pond is new again.
Can you elaborate on the formula you are using to figure 22.5lbs of food is the same as 50lbs of alfalfa, nutrient-wise? I'm struggling with this a bit.
