How to Lower the Nitrates a Reef Tank

In order to have a thriving reef aquarium, you need the nitrate level to be only less than 5 ppm (parts per million). Some salt water fish keepers say that the level should be .25 ppm. Nitrates are the chemical produced from creature waste, as well as any rotting uneaten food. You need to keep a close eye on your reef tank's nitrate levels.

Things You'll Need

  • Nitrate test kit
  • Water siphon
  • Bucket
  • New prepared salt water
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Instructions

    • 1

      Take a nitrate test of your tap water. Directions will be different depending on what brand of nitrate test you have.

    • 2

      Do a partial water change of a quarter to one fifth of the water in your tank with your siphon and bucket.

    • 3

      Add sea salt mixture (available in pet stores) to your water to get the right ratio for your tank.

    • 4

      Add new salt water to your reef tank.

    • 5

      Take another test of the nitrate levels in your tank water

    • 6

      Dim the lights for the tank, if possible.