🌾 Agri-Business Desk
Biofloc Fish Farming Setup Cost & PMMSY 40% Subsidy — West Bengal Guide (2026)
Biofloc fish farming setup cost (tarpaulin tanks, air pumps, probiotics), the PM Matsya Sampada Yojana 40–60% subsidy, application steps, income calculations and the route through West Bengal's fisheries department — the complete guide.
West Bengal is India’s leading fish-farming state — but traditional pond farming is limited to how much crop land you can spare. The new path is Biofloc — dense farming of singhi, koi and pabda in 4–6 metre diameter tarpaulin tanks, even in a 3–4 katha courtyard. High output in little space, less water — and the PM Matsya Sampada Yojana (PMMSY) covers up to 40% of unit cost (60% for women and SC/ST beneficiaries), sharply cutting the start-up burden.
This guide covers the real setup costs, the subsidy route and the income math.
At a glance: biofloc setup
| Item | Details |
|---|---|
| Entry unit | 2 × 4–6 metre tarpaulin tanks |
| Total project cost | About ₹1.5 lakh |
| PMMSY support | 40% (general) / 60% (women, SC/ST) |
| Subsidy amount (2-tank unit) | ₹60,000 / ₹90,000 |
| Farming cycle | 5–6 months |
| Space needed | 3–4 katha (flat land with sunlight is enough) |
Cost breakdown (2-tank unit, approximate)
| Item | Approximate cost |
|---|---|
| 2 × tarpaulin tanks (4–6 m, with frames) | ₹45,000–65,000 |
| 2 × air pumps (ring blowers) + air stones and pipes | ₹15,000–25,000 |
| Biofilter/sedimentation setup | ₹10,000–20,000 |
| Ammonia-pH test kit, thermometer, TDS meter | ₹8,000–12,000 |
| Probiotics, carbon source, feed (per cycle) | ₹25,000–40,000 |
| Mini pump, plumbing, generator backup (optional) | ₹10,000–20,000 |
| Total | About ₹1.5 lakh |
These figures are approximate market prices. The hardware (tanks, air pumps, test kits) is now also available on online e-commerce — before buying, compare quotations and reviews from at least two suppliers.
PM Matsya Sampada Yojana: the subsidy route
PMMSY is the flagship scheme of the Union Ministry of Fisheries, Animal Husbandry and Dairying — both biofloc and RAS (Recirculating Aquaculture System) are approved activities under the scheme:
- General category: up to 40% support on unit/project cost
- Women, SC/ST beneficiaries: up to 60% support
- The balance is own funds, a bank loan or a mix of both — the entire project is bank-financeable
- Apply: pmmsy.dof.gov.in portal or the district fisheries office (in West Bengal, through the state fisheries directorate)
Keep Aadhaar, bank passbook, land/residence proof and photographs/description of the planned unit ready when applying.
Income math (approximate)
With good management, a 4-metre tank can produce up to 800–1,200 kg of fish in 5–6 months. At singhi/koi market prices of ₹250–400/kg, gross income per tank per cycle is reckoned at ₹2–3.5 lakh. After feed, seed, electricity and probiotics, a net margin of 30–45% is realistic — meaning a 2-tank unit can net ₹1.5–3 lakh a year over 1–2 cycles.
But these numbers are best-case — a water-management mistake can wipe you out in a day. So it is safer to start with subsidy plus own money rather than taking a large loan for the first cycle.
Daily work (the real challenge)
- Morning/evening ammonia, pH and TDS tests — keep a diary
- Regular probiotic and carbon-source (jaggery/bran) doses — they keep the floc alive
- Running the air pump 24 hours — you need a backup for power cuts
- Feeding 2–3 times a day, by fish weight — overfeeding means an ammonia spike
Biofloc is not just buying a tank — it is a business of daily discipline. Do not start without training.
Next steps
- Planning a bigger project? See the PMFME food processing subsidy guide — there are opportunities in fish-based processing too.
- The full list of government schemes is in the government schemes section.
🪜 Step-by-step guide
- Get trained
Before setting up tanks, complete a biofloc training approved by the state fisheries department, NFDB or an agricultural university (BCKV/WBUAFS) — you must learn ammonia management and carbon-source calculation.
- Decide the unit size
Start with a 2-tank unit (4–6 m diameter tarpaulin tanks) — total project cost about ₹1.5 lakh; a home courtyard or 3–4 katha of land is enough.
- Apply online to PMMSY
Apply on the pmmsy.dof.gov.in portal or at the district fisheries office — you will need Aadhaar, bank passbook, land/residence proof and photographs of the unit.
- Subsidy approval and bank loan
Under PMMSY, general-category beneficiaries get up to 40% of unit cost, and SC/ST/women beneficiaries up to 60% — the rest is own contribution or a bank loan.
- Set up the unit
Install the tarpaulin tanks, air pump and air stones, biofilter, probiotics and ammonia test kit; stock seed fish (singhi, koi, pabda or tilapia) and begin farming.
- Water management and sale
Test ammonia and pH daily, dose probiotics and carbon source (jaggery/bran) regularly; harvest in 5–6 months and sell at the local market or fish market.
❓ Frequently asked questions
How much total investment does a biofloc unit need?
An entry-level 2-tank unit (4–6 m diameter tarpaulin tanks, air pumps, biofilter and test kits included) costs about ₹1.5 lakh. With PMMSY subsidy, general-category beneficiaries get up to ₹60,000 (40%) and women/SC/ST beneficiaries up to ₹90,000 (60%) — the rest is own funds or a bank loan.
How much income does one tank generate?
A 4-metre tank can produce up to 800–1,200 kg of fish per cycle (5–6 months). With singhi/koi market prices of ₹250–400/kg, gross income per tank per cycle is reckoned at ₹2–3.5 lakh — but after feed, seed and electricity costs, a net margin of 30–45% is realistic.
How do I get the PMMSY subsidy?
Apply on the pmmsy.dof.gov.in portal or at the district fisheries office — assistance is disbursed after the unit/project is approved. Up to 40% of unit cost for the general category, and up to 60% for SC/ST/women beneficiaries.
What is the biggest risk in biofloc farming?
Water quality — if ammonia spikes, fish can die overnight. That is why daily testing, proper aeration and probiotic management are essential. The second risk is the market: singhi/koi prices fluctuate by region, so line up your buyers before you start farming.
Which fish grow well in biofloc?
Singhi and koi are the most popular — high value and well suited to biofloc's dense stocking. Pabda, tilapia and anabas (climbing perch) are also farmed. Choose based on seed availability and local market demand.