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Accurately measure the ammonia (NH3/NH4) in your saltwater aquarium with the advanced colorimetric test from Red Sea.
6. Remove the cap and move the vial between the designated positions on the color card, look into the vial from above and compare the color in the vial to the colors on the card. Choose the Ammonia level that gives the closest color match and if necessary estimate an intermediate value.
Note: This kit measures the total ammonia (NH3/NH4).