Zoolek Nitrate (NO3) Water Test

Zoolek Aquatest NO3 is a drop test for measuring the nitrate content of aquarium water. Nitrate is the final product of the nitrogen cycle.

The test suits aquariums and garden ponds. According to the available data, excess nitrate encourages algae growth and has adverse effects on aquariums and ponds.

To measure, add the reagents to the water sample one after another as the instructions describe and match the resulting colour with the colour scale. When nitrate is too high, the tank needs a partial or almost complete water change and a clean of the tank, substrate and filters; if needed, keep fewer fish.

The set includes two bottles of reagent solutions, a container with reducing agent powder, a colour scale, directions for use and the tools needed for measuring.