About 250 pounds worth for your 6 acre pond. You also have a shorter 'growing season' than those in Texas so you will need to try to buy larger adults (more costly). In the south they can stock smaller fish, and less pounds, and rely on the millions of offspring to grow up to a size where they can do the heavy 'eating' of the algae. By me in lower MI, I have to stock more adults and larger sized adults as by the time the water warms up to 70 and they have babies the babies don't have enough warm weather left in the season to grow large enough to eat the algae before fall comes and they all go belly up.
