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

Biomass Kilograms (kg)

Required number in kg.

Excretion Grams TAN Per Kg Day (g TAN/(kg·day))

Required number in g TAN/(kg·day).

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

Estimate daily total-ammonia-nitrogen excretion from biomass and an externally determined excretion rate. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

TAN Excretion Kg Per Day (kg TAN/day)

Returned number in kg TAN/day.

• 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.

• Daily Feed Rate

  Convert a chosen daily feeding percentage of live biomass into feed mass per day.

• Biomass

  Estimate live biomass from animal count and sampled mean body mass.