How much concentration of NO3 in this experiment??  Normally we use annamox or many way such as water fertilizer?? If NO3 concentration is so less 0.2-2.0 ppm Filter is the best.

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How much concentration of NO3 in this experiment??  Normally we use annamox or many way such as water fertilizer?? If NO3 concentration is so less 0.2-2.0 ppm Filter is the best.