Note: Most tanks have normal or high nutrient levels. Low nutrient levels generally only occur when the bio-load (ie number of fish) is low.
- HIGH: Nitrate > 3.0 mg/L (ppm) / Phosphate >0.06 mg/L (ppm)
- NORMAL: Nitrate 1.0 - 3.0 mg/L (ppm) / Phosphate 0.02 - 0.06 mg/L (ppm)
- LOW: Nitrate < 1.0 mg/L (ppm) / Phosphate <0.02 mg/L (ppm)