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API Nitrite Test Kit For Fish Aquarium
  • API Nitrite Test Kit For Fish Aquarium
  • API Nitrite Test Kit For Fish Aquarium
  • API Nitrite Test Kit For Fish Aquarium
  • API Nitrite Test Kit For Fish Aquarium

API Nitrite Test Kit For Fish Aquarium

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    1. Once Only Don't pay^ $24.79
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API Nitrite Test Kit For Freshwater And Saltwater Fish Aquarium Helps To Maintain A Safe And Healthy Environment For Your Fishy Friends
  • The test kit quickly and accurately measures nitrite levels in aquarium water to keep your fish happy and healthy 
  • Nitrite is a toxic chemical produced when nitrifying bacteria break down ammonia in water
  • Nitrite can occur due to fish waste and uneaten fish food in the tank 
  • Low levels of nitrite inhibit respiration and suppress the immune system
  • High nitrite levels can result in fish suffocation and death
  • By testing your aquarium’s nitrite level, you can correct it before it becomes unsafe for your fish
  • Measures nitrite levels from 0 ppm - 5 ppm (mg/L)
  • The test kit is a quick, easy and simple way to keep your fishy friends safe, happy and healthy

Why Test for Nitrite?

  • Nitrite is produced in the aquarium/pond by the biological filter
  • Beneficial bacteria in the biological filter convert ammonia into nitrite
  • The biological filter then converts nitrite into nitrate
  • Nitrite is toxic and will prevent fish from carrying on normal respiration, and high levels will lead to death 
  • Even trace amounts of nitrite stress fish, suppressing their immune system and increasing the likelihood of disease
  • Too many fish, as well as uneaten food and decomposing plants and other organic matter,  can cause excessive nitrite levels
  • Water should be tested for nitrite when the aquarium is first set up, and once a week after the biological filter has been established  (in about 4-6 weeks)
  • Using API QUICK START will help accelerate the development of the biological filter 

Pack Contains:

  • 180 tests 
  • 1 test solution
  • Glass test tube
  • Colour chart
  • Easy-to-read instructions

Testing Tips

  • This test kit reads total nitrite level in parts per million (ppm) which are equivalent to milligrams per litre (mg/L) from 0 - 5 ppm (mg/L)

Directions for Use

  1. Fill a clean test tube with 5mL of water to be tested (to the line on the tube)
  2. Add 5 drops of Nitrite Test Solution, holding the dropper bottle upside down in a completely vertical position to assure uniformity of drops 
  3. Cap the test tube and shake for 5 seconds
  4. Wait 5 minutes for the colour to develop
  5. Read the test results by comparing the colour of the solution to the Nitrite Colour Card - the tube should be viewed in a well-lit area against the white area of the card. The closest match indicates the ppm (mg/L) of nitrite in the water sample. Rinse the test tube with clean water after use 

What The Test Results Mean:

  • In new aquariums/ponds, the nitrite level will gradually climb to 5 ppm (mg/L) or more
  • As the biological filter becomes established, nitrite levels will drop to 0 ppm (mg/L)
  • In an established aquarium, the nitrite level should always remain at 0; any level above 0 can harm fish
  • The presence of nitrite indicates possible over-feeding, too many fish, or inadequate biological filtration 

Reducing Aquarium Nitrite Levels

  • Add API NITRA-ZORB/AQUA DETOX to the aquarium filter to remove nitrite from freshwater aquariums
  • Making partial water changes can also help reduce nitrite, especially if the initial level is very high 
  • Use API QUICK START to help speed the development of the biological filter
  • Adding API AQUARIUM SALT will reduce nitrite toxicity to fish while the biological filter is removing the nitrite 

Reducing Pond Nitrite Levels

  • Make sure adequate oxygenation and surface agitation are provided
  • If the nitrite level exceeds 0.50 ppm, begin making water changes (25%) every 2 days until nitrite drops to 0.25 ppm or less
  • Even a low level of nitrite can cause severe stress to pond fish, leading to disease outbreaks and fish death 
  • To reduce the harmful effects of nitrite, add API POND SALT as directed
  • POND SALT will also add the natural electrolytes that fish lose in times of stress


^Don't Pay refers to the recommended retail price as supplied by the manufacturer. Our advertised price is regularly lower than the RRP. Where an RRP has not been supplied, the retail price for the equivalent product(s) as seen on the website of major Australian retailers in the last 30 days.
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