Use this calculation to compare aquaculture production, feeding, growth, water-quality, or hatchery measurements collected with the same definitions and units.

TAN Oxidized Kilograms (kg TAN)

Required number in kg TAN.

Alkalinity Kg Caco3 Per Kg N (kg/kg)

Required number in kg/kg.

The cited overview of Aquaculture supplies background for the terminology and domain context used by this tool.^[1]

Estimate alkalinity equivalent consumed by nitrification using an explicitly entered CaCO3-per-N factor. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Alkalinity Kg Caco3 (kg CaCO3)

Returned number in kg CaCO3.

• Species, life stage, temperature, salinity, system design, sampling method, and management practice can materially change aquaculture measurements and suitable operating ranges.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Complement the calculation with calibrated water-quality instruments, representative sampling, feed and mortality records, and species-specific guidance from qualified aquatic-health or production professionals.

• TAN Production

  Estimate total-ammonia-nitrogen loading from daily feed and an explicitly supplied feed-to-TAN factor.

• Feed Cost Per Kg Gain

  Estimate feed cost per kilogram of wet biomass gain from FCR and feed price; other production costs are excluded.

• Hardness Adjustment

  Convert a desired hardness increase stated as mg/L CaCO3 to kilograms of CaCO3 equivalent. Actual product mass depends on its chemistry and purity.