Fish Pond Stocking & Fingerlings & Harvest
Stocks carp
Enter pond area, stocking density, survival rate and harvest weight to get how many fingerlings to stock, the number harvested and the biomass yield for your pond.
Plan your stocking
Next: stock 600 healthy fingerlings, aerate and feed for the species, and thin/partial-harvest if growth lags.
Densities are typical for the species/system; polyculture, aeration and feeding change the safe density — follow local fisheries advice.
Fish pond stocking — key facts
- Fingerlings
- area (m²) × density
- Harvested
- stocked × survival%
- Biomass
- harvested × harvest weight
- Composite carp
- ≈ 0.6 fish/m²
- Tilapia
- ≈ 3 fish/m²
- Pangasius
- ≈ 5 fish/m²
- Vannamei shrimp
- ≈ 30/m²
- Privacy
- Runs in your browser; nothing uploaded
Stock for growth, not just for numbers
Get stocking right and a pond practically runs itself; get it wrong and you either waste water on too few fish or crash the pond with too many. Density is the lever: too dense and growth stalls while crowding, low oxygen and disease threaten a sudden fish kill; too sparse and the pond never earns its keep. The right number per square metre depends on your species, whether you aerate and feed, and the size you want at harvest.
This tool turns pond area and density into fingerlings to stock, the number you can expect to harvest, the biomass yield in kg and the yield per hectare — using species presets for carp, tilapia, pangasius and shrimp. Use it to order the right quantity of seed and to set a realistic harvest target. Pair it with the Feed Conversion Ratio and Farm Pond tools to plan feed and water for the crop.
Order the right seed
Stock the fingerlings the pond can carry.
Avoid fish kills
Keep density below the oxygen limit.
Set a harvest target
Biomass yield from survival and weight.
Benchmark the pond
Yield per hectare to compare your system.
Frequently Asked Questions
What is fish pond stocking?+
Stocking is putting the right number of fingerlings into a pond so they grow to market size without overcrowding. The number depends on pond area and the stocking density you choose — fish per square metre — which balances fast growth against the crowding, low oxygen and disease that come with packing too many fish into the water.
How many fingerlings should I stock?+
Fingerlings to stock = pond area (m²) × stocking density (fish per m²). For example a 2000 m² pond at a composite carp density of 0.6 fish/m² needs about 1200 fingerlings, while the same pond at a tilapia density of 3 fish/m² takes around 6000. Pick the density that suits your species, water quality and management.
What are typical stocking densities?+
Common starting densities are about 0.6 fish/m² for composite (polyculture) carp, around 3/m² for tilapia, roughly 5/m² for pangasius, and about 30/m² for vannamei shrimp. These are general guides — aeration, feeding, water exchange and target size all shift the safe density up or down.
How is the harvest number worked out?+
Number harvested = fingerlings stocked × survival rate. Survival is rarely 100% — fingerlings are lost to predation, handling stress, disease and poor water early on, so 70–90% survival is common in well-managed ponds. If you stock 6000 tilapia at 85% survival you can expect to harvest about 5100 fish.
How is biomass yield calculated?+
Biomass yield (kg) = number harvested × harvest weight per fish. So 5100 fish grown to an average 400 g each give about 2040 kg of fish. Dividing by the pond area in hectares gives the yield per hectare, which lets you compare your pond's productivity against benchmarks for your species and system.
Why does density affect growth so much?+
Density sets how much space, oxygen and feed each fish gets. At low density fish grow fast to a large size but the pond is under-used; at high density total tonnage rises but individual fish grow slower, stress more and the pond is more likely to crash from low oxygen. The right density trades off size against total yield.
Can I stock more than one species together?+
Yes — polyculture stocks species that feed at different levels (surface, column and bottom feeders such as catla, rohu and mrigal) so the pond's natural food is used fully. The combined density is split across species; this tool gives the total fingerlings and yield, and you allocate the share to each species.
Does aeration let me stock more heavily?+
Yes — the main limit on density is dissolved oxygen, so adding aerators, exchanging water and feeding well let a pond safely carry far more fish than an unaerated earthen pond. Intensive aerated systems run many times the density of extensive ponds, but they also need closer monitoring to avoid sudden fish kills.
Are the figures exact?+
They're solid planning figures. Real survival and harvest weight depend on water quality, feed, disease, predation and how long you grow the crop, so treat the outputs as a stocking plan and refine them against your own pond records. Start conservative on density until you know how your pond behaves.