API Nitrate Test Kit NO3 317163000182 FW SW Freshwater Saltwater
API Nitrate Test Kit

API Nitrate Test Kit


  • $ 14.99
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High nitrate levels in your aquarium indicate a build-up of fish waste and organic compounds, resulting in poor water quality and an increase in algae growth. Contrarily, maintaining a low nitrate level improves the health of fish and invertebrates.

Use the API® NITRATE TEST KIT to ensure that the nitrate levels in your tank are safe and healthy for your fish. The NITRATE TEST KIT reads parameters from 0 to 160 ppm and may be used for both fresh and saltwater aquariums.


Contains 90 tests and includes 2 test solutions, easy-to-ready instructions, glass test tube and color chart.

API Test Kit BFA Item #
Nitrate Test Kit AP00018


Made in the USA


Are high nitrate levels harmful to fish?
High nitrate is harmful to fish, but is significantly less toxic than ammonia or nitrite. Effects of high nitrate levels are more gradual if parameters go untreated – fish will eventually lose their appetite and grow sluggish and inactive over time. High nitrate also contributes to rapid algae blooms in aquariums.

How often should I use API NITRATE TEST KIT?
Use API NITRATE TEST KIT weekly or bi-weekly to ensure your nitrate levels are safe for fish, or whenever you suspect you may have high nitrate levels in your tank.