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

Initial Oxygen Mg Per Liter (mg/L)

Required number in mg/L.

Final Oxygen Mg Per Liter (mg/L)

Required number in mg/L.

Sample Fraction (ratio)

Required number in ratio.

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

Compute oxygen demand from initial and final dissolved oxygen with the dilution fraction; incubation duration and controls must be specified externally. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

BOD Mg Per Liter (mg/L)

Returned number in mg/L.

• 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.

• Oxygen Consumption

  Estimate hourly stock oxygen demand from a measured or separately specified per-kilogram rate.

• DO Saturation

  Express measured dissolved oxygen as a percentage of the saturation concentration at the same conditions.

• Survival Rate

  Measure the fraction of the initial stocked animals surviving to a census.