Borgmann Aquaponics Hydroponics
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Important Information: This calculator determines the toxic ammonia fraction (NH₃-N) from your water parameters. Toxicity depends on pH, temperature, and salinity.
Input Values
Use 0 g/L for freshwater
Results
Calculated Values
Total Ammonium as N:
0.78 g/m³ NH₄-N
Ammonia Fraction (NH₃):
1.8%
Toxic Ammonia (NH₃-N):
0.014 g/m³
Risk Assessment
Will be displayed after calculation
Recommended Limits (NH₃-N):
- Salmonids: < 0.0125 g/m³
- Cyprinids: < 0.031 g/m³
- Chronic Exposure: Try to stay below these levels
Recommendation
Enter water parameters and start calculation.
Scientific Background
The calculation is based on the ammonium/ammonia equilibrium:
NH₄⁺ ⇌ NH₃ + H⁺
The NH₃ fraction is determined using the Henderson-Hasselbalch equation, taking temperature and ionic strength (salinity) into account.
Conversion formula: NH₄-N = NH₄⁺ × 0.776
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