Ponds are not perfect or absolute, and many times the answers to pond related questions are delivered in the same fashion. Everyone here is trying to help, but as is often said here at PB, the numbers you're asking about sometime "depend" on a multitude of variables, which is why you are receiving so many questions.
Trying to reduce everything to a mathematical formula would be nice, but it doesn't always work that way with ponds and fish, at least not before first establishing all of the particulars.
