Aeration is usually the largest single electricity cost in a shrimp crop, so it pays to calculate it properly rather than guess. The method is simple: take the blower's absorbed power in kW, multiply by duty hours, multiply by your tariff — then reduce the total by staging blowers so you are not running full air during the daytime oxygen surplus. This article works the numbers on real YEBL-1 machines and shows where the savings are.
The core formula
Energy cost = blower power (kW) × running hours × tariff (per kWh)
Two practical notes before the arithmetic:
- Use absorbed power, not nameplate HP alone. A 3 HP motor draws roughly 2.2 kW mechanical, and a bit more electrically depending on load and efficiency. For estimating, converting HP to kW (1 HP ≈ 0.746 kW) and allowing for load gives a workable figure.
- Duty hours are the lever. A blower that runs 24/7 costs twice one that runs 12 hours. Staging on DO is where the money is saved.
Worked example: a single intensive tank
A 250 m³ intensive shrimp tank aerated by a YEBL-1-400 (5 HP ≈ 3.7 kW class), running continuously through a ~120-day crop:
| Input | Value |
|---|---|
| Blower | YEBL-1-400, 5 HP ≈ ~3.7 kW |
| Duty | 24 h/day, 120 days = 2,880 h |
| Energy | 3.7 kW × 2,880 h ≈ 10,656 kWh |
| At ₹8/kWh | ≈ ₹85,000 per crop |
That single figure is why aeration dominates the electricity bill — and why the next section matters.
How staging cuts the bill
Shrimp only need full aeration at the night oxygen low. During the daytime photosynthetic surplus, part of the aeration can idle. Split the demand across two smaller blowers and run one by day, both at night — the DO-controller strategy from dissolved oxygen management with blowers.
Replace the one YEBL-1-400 with two YEBL-1-210 units (2 HP ≈ 1.5 kW each):
| Scenario | Day hours | Night hours | Energy per day |
|---|---|---|---|
| One 3.7 kW, 24 h | 3.7 kW × 24 | — | ~89 kWh |
| Two 1.5 kW staged | 1.5 kW × ~12 (one unit) | 3.0 kW × ~12 (both) | ~54 kWh |
Staging here cuts daily energy by roughly a third — and you gain redundancy, because if one blower fails the other still supplies half the air. Over a 120-day crop that is a large saving on top of the reliability benefit.
The standby is not a running cost
A duty-standby blower only runs when the lead fails or at the night peak, so it adds almost nothing to the energy bill — but it prevents the total loss a DO crash causes. Against the ~₹85,000 aeration cost of a crop, the standby is trivial insurance. The full cost picture of building the system is in biofloc setup cost in India — aeration.
Cutting the tariff itself
Beyond staging, the other lever is the price per unit. Solar or hybrid supply can shave the daytime tariff — precisely when aeration is partly idle anyway — and back you through outages. That trade-off is worked in solar vs grid power for aquaculture blowers.
Right-sizing avoids waste
An oversized blower runs throttled and wastes energy; an undersized one runs hot and risks the crop. Size on the pre-dawn low at peak biomass — the method in the shrimp farming aeration guide and the biofloc aeration pillar guide — so you buy exactly the air you need.
| Tank | Blower | ~kW | 24 h/120 day energy |
|---|---|---|---|
| 150 m³ | YEBL-1-210 2 HP | ~1.5 | ~4,300 kWh |
| 250 m³ | YEBL-1-400 5 HP | ~3.7 | ~10,700 kWh |
| Deep 2.2 m | YEBL-DS-320V 7.5 HP | ~5.6 | ~16,100 kWh |
Cost per kg of shrimp
The number that actually matters to a farmer is aeration cost per kilo of shrimp produced, because it lets you compare across pond sizes and crops. Take the crop energy cost and divide by the harvest weight. In the 250 m³ example, ~₹85,000 of aeration energy against, say, a several-tonne harvest works out to a modest per-kilo figure — and staging blowers, as shown above, cuts it further. Framing aeration this way stops two errors: skimping on air to "save cost" (which risks the whole harvest that the per-kilo figure divides into) and over-aerating with an oversized machine that inflates the denominator's cost without adding yield.
Five ways to cut the aeration bill
- Stage blowers on DO — run less air by day, full air at the night low. The biggest single saving.
- Right-size the machine — an oversized blower runs throttled and wastes energy; size to the pre-dawn low at peak biomass.
- Keep diffusers and filters clean — a fouled grid or choked filter makes the blower work harder for the same air.
- Size the pipe properly — friction in an undersized main is pure wasted energy, as covered in sizing an air blower for biofloc tanks.
- Offset the daytime tariff with solar — cheapest exactly when staged aeration is lightest, per solar vs grid power for aquaculture blowers.
Capital vs running cost
Two different budgets decide the true cost of aeration. The capital cost — buying the blower, standby, diffusers and pipe — is paid once and is a small share of the farm, as broken down in biofloc setup cost in India — aeration. The running cost — electricity — recurs every crop and, over a farm's life, dwarfs the capital cost. That is why it pays to spend a little more up front on a right-sized, stageable, efficient system: the saving comes back every single crop.
Worked example: annual cost of a staged farm
Scale the single-tank example to a small farm of four 250 m³ tanks, each aerated by two staged YEBL-1-210 units (1.5 kW each), running roughly one unit by day and both at night — an effective average of about 2.25 kW per tank across the 24-hour cycle:
| Input | Value |
|---|---|
| Tanks | 4 × 250 m³ |
| Effective avg power | ~2.25 kW per tank × 4 = 9 kW |
| Duty | ~2,880 h per 120-day crop |
| Energy | 9 kW × 2,880 h ≈ 25,900 kWh |
| At ₹8/kWh | ≈ ₹2.07 lakh per crop |
Run against the same tanks with one un-staged YEBL-1-400 (3.7 kW) per tank flat-out, energy would be ~4 × 3.7 × 2,880 ≈ 42,600 kWh — over 60% more. Staging is the difference between ₹2.1 lakh and ₹3.4 lakh of aeration energy on this farm per crop, before counting the redundancy it also delivers. That single comparison is why the staging decision belongs at the design stage, not as an afterthought.
Frequently asked questions
How much does it cost to aerate a shrimp pond?
Multiply the blower's kW by running hours by tariff. A 5 HP YEBL-1-400 running 24/7 for a 120-day crop uses roughly 10,000+ kWh — the largest single electricity cost in most crops.
How can I reduce aeration cost?
Stage two smaller blowers on a DO controller, right-size the machine, keep the air path clean, and offset daytime energy with solar.
Is a standby blower an added running cost?
Almost none — it runs only on failure or at the night peak, yet it prevents the total crop loss a DO crash causes.
See the aquaculture and biofloc application page for the range.
Get a costed proposal
Send your pond size, crop length and tariff and we will return a sized blower, a staging plan and an energy estimate. WhatsApp +91 9311693322 or email sales@yashblowers.org — Yash Blowers, Faridabad, 24-hour quotes.