Biofloc C:N ratio and carbon dosing calculator.
Estimate a selected carbon source amount from feed rate, feed protein, target C:N ratio and source carbon content.
Biofloc C:N ratio and carbon dosing inputs
Planning tool only. Monitor water quality and animal behaviour, validate species-specific limits and follow the direction of a qualified aquaculture professional before changing stocking, feed, aeration or water chemistry.
Method: Protein nitrogen is feed mass × protein fraction ÷ 6.25. The target C:N ratio determines carbon mass, then the selected source amount divides by its stated carbon fraction.
Inputs used: Daily feed = 10 kg/day; Feed protein = 32 %; Target carbon-to-nitrogen ratio = 12 :1; Selected carbon-source carbon content = 37 %
Assumptions: The result uses the values, units and options shown in the input snapshot.
Scope and warnings: Planning tool only. Monitor water quality and animal behaviour, validate species-specific limits and follow the direction of a qualified aquaculture professional before changing stocking, feed, aeration or water chemistry. Rounding and excluded real-world terms can make an external result differ.
How this biofloc c:n ratio and carbon dosing calculator works
Protein nitrogen is feed mass × protein fraction ÷ 6.25. The target C:N ratio determines carbon mass, then the selected source amount divides by its stated carbon fraction.
A worked example
Ten kg of 32% protein feed contains about 0.512 kg protein nitrogen. At 12:1 C:N and 37% carbon, the screen gives about 16.6 kg of source material.
Can this replace water testing?
No. Carbon dosing changes water chemistry and oxygen demand. Use verified product composition, monitor water conditions and follow qualified farm guidance.
Calculations run on your device. Review your results before exporting or sharing them.
Use the actual feed label and source composition
The calculation derives protein nitrogen from the feed protein percentage and a standard protein-to-nitrogen conversion. It then applies your chosen C:N ratio and source carbon fraction.
Molasses, sugar and rice-bran products vary in composition and moisture. Dosing should follow verified product data and observed water chemistry, never a calculator output alone.
Published by ToolMitra — methods and editorial approach.