Click a district to set your pond's location.
Slide to see what more oxygen is worth.
Your pond
Move the sliders — estimates update instantly.
Your estimate
Set your pond's inputs on the left to see an estimate.
At most +18% more saleable fish, for a pond short of oxygen in every month of the crop — less when it is short only some of the time. Not a guarantee: we measure your pond with a DO meter during the free demo.
Seasonal strip
Water temperature, thermal suitability and oxygen stress before/after, month by month.
Where does this species grow best?
This comparison keeps every other input fixed and varies only the city's climate.
Profit waterfall
How the extra profit is built, per crop — low case and high case side by side.
Assumptions
Every parameter behind this estimate — value, unit, status, date and source.
| Parameter | Value | Status | Date | Source |
|---|
How this is calculated
1. Pond water temperature
Each district uses its nearest weather station. Shallow tropical ponds follow the air temperature closely, so the monthly air temperature gives the pond's water temperature.
2. The right temperature for your fish
Every species grows best in a certain temperature range. Months inside that range count fully and months outside it count less, which sets the expected harvest size.
3. Oxygen through the night
Overnight, fish, plankton and the pond bottom use up oxygen while your existing aeration puts some back. We work out how much is left at dawn, when it is lowest.
4. What OXY-Nano adds
We compare that dawn oxygen with the level your species needs to grow and survive, then add the oxygen an OXY-Nano unit delivers each month.
5. The gain, capped at +18%
The extra oxygen becomes extra growth and better survival. A pond short of oxygen in every month gains at most +18% more saleable fish, never more; a pond short only some of the time gains proportionally less.
6. Economics and payback
Extra harvest at your farm-gate price, less the extra feed and electricity it costs to produce, gives the extra profit per crop and per year. Payback divides the unit's capital cost (less any subsidy) by the extra annual profit; it stays blocked until you enter a real unit price.
7. Sizing the units
The number of units needed is set by the worst crop month's oxygen deficit, so the unit count reflects your pond's night-time chemistry rather than a flat per-acre rule.
Known limitations
- It uses average monthly weather, not this year's actual weather.
- Disease, water exchange and sudden algae crashes are not included.
- The gain is a careful estimate, not a measurement of your pond.
- Prices are typical market ranges — enter your own price for a closer estimate.
Estimates only. We verify your pond's real numbers with a free DO-meter demo before you pay anything.
Data sources and licences
- District boundaries — geoBoundaries gbOpen IND ADM2, licensed under ODbL 1.0.
- Map tiles — © OpenStreetMap contributors, ODbL.
- Weather averages — IMD Pune, Climatological Tables of Observatories in India 1991–2020.
- District fish production — DES, Statistical Hand Book of Tamil Nadu 2021-22, Tables 8.2 and 8.3.
- Farms, hatcheries and seed farms — TN Fisheries Policy Note 2025-26, Tables 4, 7 and 8.
- Agro-climatic zones — TNAU seven-zone classification.
- Crop costs and yields — NABARD / TNAU 2015 model projects.
- Electricity tariff — TNERC tariff order, LT III-A(1) and LT IV, effective 2025-07-01.
- Subsidy rates — PMMSY.
- Oxygen saturation — Benson & Krause 1984, as used by USGS DOTABLES; night-time oxygen budget after Boyd.
- Research on oxygen and fish growth — Mauladani et al. 2020, Rahmawati et al. 2021, Tran-Duy et al. 2008, Boyd & Hanson 2010.
- Product figures — oxyniti.com product pages (2 L/min and 6 L/min oxygen input).