Fish Stocking Calculator

This calculator starts from published baseline stocking rates per acre for four common pond species — bluegill at 500/acre, catfish at 200, trout at 400, and bass at just 100, reflecting bass's role as a larger predator that needs more room and forage per fish — then layers on two adjustments. Management goal scales density directly: trophy management halves the stocking rate (fewer fish means less competition for food, so each one grows larger), while harvest/put-and-take management increases it 50% (more fish means more frequent catches, accepting smaller average size). Pond depth then adjusts the rate again, adding 15% for ponds deeper than 8 feet and cutting 25% for ponds shallower than 4 feet, since deeper water stratifies into oxygen-rich layers that support more biomass while shallow ponds are more prone to oxygen crashes, especially in summer.

For bass specifically, the calculator also computes forage fish (bluegill) needed at an 8:1 ratio to sustain the predator population — bass are true predators and will out-eat any pond that isn't stocked with enough smaller fish beneath them — with a smaller 2:1 supplemental ratio for catfish, which forage more broadly and needs less. Expected growth rate combines species baseline growth with the same management and depth logic: trophy management boosts growth 30% (less competition), harvest management cuts it 20% (more mouths competing for the same food), and shallow, warm water gives warm-water species like bass and bluegill an extra 10% growth boost from higher metabolic rates. This is a planning estimate, not a guarantee — actual carrying capacity depends heavily on forage base, water chemistry, and predation pressure the calculator can't measure directly.