Water test for measuring ammonia NH3 and ammonium NH4 in fresh and marine water aquarium.
The measurement scale of ammonia goes from 0 to 10 mg/l. In aquarium and pond, high ammonium level (NH4) is most commonly caused by defective functioning of the filter, due to poor or insufficient water purifying bacterial activity. Ammonium (NH4) turns into ammonia (NH3) when the pH reaches above 7. Therefore it is really important to check the pH value in addition to the ammonium level (NH4. If ammonia level (NH3) exceeds 0.02 mg/l is very harmful for fish gills and poisonous for water, in the long term. In this case, it is recommended to replace 50% of water and reduce the ammonia level utilizing NITRIDAC which promotes bacterial activity in the filter.


1. Rinse the water sample test tube several times with the water to be tested and then fill with sample water to the 5 ml mark.

2. Add 4 drops of the test reagent solution and mix repeatedly turning the test tube upside down. If the sample contains ammonia, the colour changes. Test developements takes 10 to 13 minutes.

3. Match the colour of the sample with the colour chart by positioning the test tube next the most similar colour. For accurate readings compare the colours from above.

4. If ammonia is not present in the water, the fresh water solution remains clear and for salt water samples the solution turns a milky white colour.

CAUTION: if the ammonia level exceeds 1,0 mg/l we recommended that you immediatly change a third of the water in the aquarium, if the level reading is between 0,1 and 0,5 mg/l reduce the ammonia level in the water utilizing PRODAC NITRIDAC.  Thoroughly clean the test tube after use, securely seal all reagent containers and store in a cool, dry place away from sunlight. Keep the product out of reach of children.