Berapa jumlah benih untuk kolam bioflok diameter 3 meter?

Dengan volume air sekitar 5,65 meter kubik dan padat tebar 100 sampai 150 ekor per meter kubik, kolam diameter 3 meter dengan tinggi air 0,8 meter menampung sekitar 565 sampai 850 ekor benih ikan nila. Angka ini hanya aman bila aerasi berjalan 24 jam.

Bagaimana cara menghitung kebutuhan pakan bioflok?

Kebutuhan pakan sepanjang satu siklus diperkirakan dari bobot panen dikali nilai FCR atau rasio konversi pakan. Bila panen 200 kilogram dengan FCR 1,3, maka pakan yang dibutuhkan sekitar 260 kilogram. Pada sistem bioflok yang sehat, FCR biasanya lebih rendah daripada kolam biasa karena ikan juga memakan flok.

Berapa banyak molase yang dibutuhkan kolam bioflok?

Sumber karbon seperti molase umumnya diberikan sekitar setengah dari berat pakan harian untuk menjaga rasio karbon terhadap nitrogen di kisaran 15 sampai 20 banding 1. Takaran pastinya menyesuaikan kadar protein pakan dan hasil pengukuran amonia di kolam.

Biofloc Pond Calculator

Fill in your pond size and harvest target, and the numbers are worked out automatically. We keep this calculator open to anyone planning a biofloc pond, including farmers outside Cirebon. Every calculation runs in your own browser and we store no data.

Pond Size

Pond diameter (meters)

Water depth (meters) The water level, not the height of the pond wall.

Number of ponds

Production Target

Stocking density (fish per m³) Common reference for tilapia biofloc: 100 - 150 fish per m³.

Harvest weight per fish (grams)

Survival rate / SR (percent) What percent of the fingerlings are expected to survive to harvest.

FCR (feed conversion ratio) Kilograms of feed to produce 1 kg of fish.

Costs & Prices

Feed price (Rp per kg)

Fingerling price (Rp per fish)

Fish selling price (Rp per kg)

Molasses to feed ratio Usually about 0.5 kg molasses per 1 kg feed.

Results

Density at harvest - -

Water volume per pond: -
Total water volume: -
Fingerlings stocked: -
Fish surviving to harvest: -
Estimated harvest: -
Feed needed: -
Molasses needed: -
Suggested aeration points: -

Rough Cost Estimate

Fingerling cost: -
Feed cost: -
Estimated revenue: -
Revenue minus fingerlings & feed: -

The figure above does not yet account for electricity, depreciation of the pond and blower, labor, probiotics, medicine, or transport. Treat this number as an upper bound, not net profit.

How to Read the Results

The formulas this calculator uses, so you can check them yourself

The formula behind each number
Result	Formula	Note
Water volume	3.14159 x (diameter / 2)² x water depth	Uses the water depth, not the height of the pond wall
Fingerling count	water volume x stocking density	A high stocking density is only safe with 24-hour aeration
Fish at harvest	fingerling count x SR	A reasonable SR for biofloc tilapia is 80 - 90 percent
Harvest yield	fish at harvest x weight per fish	Market weight for tilapia is usually 250 - 350 grams
Harvest density	harvest yield / water volume	The most important number for judging aeration capacity
Feed needed	harvest yield x FCR	A healthy biofloc FCR is usually 1.1 - 1.4
Molasses needed	feed needed x molasses ratio	To keep the C:N ratio in the range of 15 - 20 to 1
Aeration points	1 point per m³, at least 4 per pond	A rough reference, adjust it to your blower capacity

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Read the Complete Biofloc Guide

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Biofloc Pond Calculator - Cirebon Smart Farm https://www.cirebonsmartfarm.com/kalkulator-bioflok.html

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Citation for written work

Cirebon Smart Farm. (2026). Biofloc Pond Calculator. Retrieved from https://www.cirebonsmartfarm.com/kalkulator-bioflok.html

Questions About the Calculations

What people ask most often when planning a pond

How do you calculate the water volume of a round biofloc pond?

The water volume of a round pond is calculated as pi times the radius squared times the water depth. The radius is half the diameter. For a pond 3 meters in diameter with a water depth of 0.8 meters, the volume is about 5.65 cubic meters. What counts is the water depth, not the height of the pond wall.

How many fingerlings for a pond 3 meters in diameter?

With a water volume of about 5.65 cubic meters and a stocking density of 100 to 150 fish per cubic meter, that pond holds about 565 to 850 tilapia fingerlings. This figure is only safe if aeration runs a full 24 hours and there is backup power.

How do you calculate the feed needed?

The feed needed over one cycle is estimated from the harvest weight times the FCR value. For a 200 kilogram harvest with an FCR of 1.3, the feed needed is about 260 kilograms. In a healthy biofloc system the FCR is usually lower than in an ordinary pond because the fish also eat the floc.

How much molasses is needed?

A carbon source such as molasses is usually given at about half the weight of the feed, to keep the carbon to nitrogen ratio in the range of 15 to 20 to 1. The exact dose depends on the protein content of the feed and the ammonia readings in the pond.

What final density is still safe?

Biomass density at harvest in a biofloc tarpaulin pond is usually in the range of 15 to 35 kilograms per cubic meter. Above 35 kilograms per cubic meter, oxygen demand rises sharply, so aeration, daily measurement, and backup power have to be genuinely ready.

Is the data I enter stored?

No. Every calculation runs in your own browser. This website is a static page with no database, so no numbers are sent or stored anywhere.

Where to Go Next

Once the numbers make sense, here are the next steps