I understand what you guys are saying. However I see the question a little different than that. The problem with that line of thought (I learned this the hard way) is it does not factor in the water quality on day 1. Here is an example. The water could on day 1 be short only a little in Phosphorus (P) resulting in the high visibility (no visible bloom). If the entire pond is short only a little on P , say the equivalent of that produced by 10,000 lbs of fish food , then at that point the bloom is going to go from low to high as the sole limiting factor is removed.

This is another one of those "It depends" answers as are so common in water quality questions. Stated another way - depending on water quality anything that removes the limiting factor or adds a missing ingredient can cause a big change in fertility and other things. That includes the addition of fish food even at much lower rates. \:\)