Sera – Ammonium / Ammonia Test (NH4/NH3)

(1 customer review)


Out of stock


Ammonium and ammonia mainly arise from fish waste. They are converted into each other depending on the pH value.
While ammonium is mostly harmless, ammonia is toxic to fish.

The sera NH4/NH3-Test allows monitoring the total concentration of both (the actual ammonia level can be calculated according to the pH value the using the included chart).

In case of acute danger, sera toxivec (freshwater) or sera pond toxivec (pond) provide help.
sera bio nitrivec (freshwater), sera marin bio reefclear (marine water) or sera pond bio nitrivec (pond) actively counteract lasting enrichment of these substances.

Sufficient for approx. 60 measurements.



Usage Directions

High ammonium levels indicate a disturbed or not fully developed bacterial activity in the filter. Ammonia (NH3) formed from ammonium (NH4) in case of pH values above 7 is especially dangerous. Even ammonia values of 0.02 mg/l lead to gill damages in the long term. Therefore you should always check the pH value in addition to the NH4 level. Evaluation and judgment of the measured values is effected using the chart in the margin. sera toxivec immediately lowers the ammonia value in acute cases. Additionally, the biological filter activity should be improved by using sera bio nitrivec (freshwater), sera pond bio nitrivec (ponds) or sera marin bio reefclear (marine water), respectively. Regu- lar partial water changes prevent too high water pollution.


Directions for use: Shake reagent bottles well before using! Do not allow tested water to contact aquarium or pond water!

  • Rinse the measurement vial several times with the water to be tested, then fill to the 10 ml mark (freshwater) or the 5 ml mark (marine water). Dry the vial on the outside.
  • Add 6 drops of reagent 1 and shake until the liquid is evenly
  • Add 6 drops of reagent 2 and shake the same
  • Add 6 drops of reagent 3 and shake the same
  • Compare the colors after 5 Place the vial on the chart and com- pare the colors from a position above under natural daylight. Avoid direct sunlight.
  • Evaluate the level of free, toxic ammonia (NH3) from the measured value and the pH value according to the chart on the enclosed leaflet.
  • Cleaning: Clean the vial thoroughly with tap water before and after each

Close reagent bottles immediately after use and do not exchange caps. Store at room temperature and away from light. For testing ornamental fish aquariums and pond water only.

NH4pH value


actual NH3 level in mg/l

0.5 mg/l0.0030.0090.030.080.18
1 mg/l0.0060.
2 mg/l0.
5 mg/l0.
10 mg/l0.060.170.531.513.60



1 review for Sera – Ammonium / Ammonia Test (NH4/NH3)

  1. Mark N. (verified owner)

    Verified reviewVerified review - view originalExternal link

    Easy test kit to use

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