Sacramento Aquarium Society

Bringing Aquarium Hobbyists of the Greater Sacramento Valley Together Since 1952

Free Ammonia Part of Total Ammonia Nitrogen (TAN) Calculator

Temperature Conversion

Amount of NH3 (Free Toxic Ammonia in the TAN)

If you know your know your temperature in Celsius skip "Temperature Conversion" fields. Enter your ammonia test results in the first field, then enter the pH from test results in the second field, then enter the temperature in °C in the third field. Click on "Calculate" button to see the amount of toxic ammonia in the TAN. A NH3 level of .6 or greater can kill many species of fish within 24 hours of exposure.

Ref Article: Ammonia Test Result is More than Ammonia