Red Sea NO3:PO4-X Nitrate & Phosphate Reducer


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Red Sea NO3:PO4-X Nitrate & Phosphate Reducer

Prevent algae breakouts by removing the nitrates and phosphates in your reef tank. NO3:PO4-X Nitrate & Phosphate Reducer from Red Sea is a complex of carbons each with a different strain of microorganisms in a reef ready solution.

Three Sizes Available

  • 100ml
  • 500mL
  • 1000mL


Red Sea’s NO3:PO4-x is a part of their Algae Management Program that combines highly effective, controlled biological reduction of nitrates and phosphates for all reef and marine aquariums. Between testing and dosing the proper additives, nutrients in the aquarium can be easily managed with no undesirable effects. NO3:PO4-x helps promote naturally occurring nutrient-reducing bacteria that already exist in your aquarium.


  • Reduces and maintains NO3 and PO4
  • Cost Effective
  • 100% Reef Safe (do not overdose)
  • Nitrate and Phosphate reduction in a controlled setting


Dosage Guide:

We highly recommend starting with half the recommended dose for your aquarium type and using high-quality Nitrate and Phosphate test kits during implementation. Keeping a steady dosing regime is key, and daily dosing is highly encouraged. We prefer to use a dosing pump system for daily dosing, which keeps the doses very precise and reliable.

Aquarium TypeRecommended

NO3 Level


PO4 Level

Average Daily

Dose of NO3-PO4-X

Mixed Reef1-2ppm0.08 – 0.12ppm2mL per 25 gallons
SPS Frags1-2ppm0.08 – 0.12ppm2mL per 25 gallons
SPS Dominant0.25 – 0.5ppm0.01 – 0.02ppm1-2mL per 25 gallons
Ultra Low Nutrient SPS0ppm0ppm1-2mL per 25 gallons
Marine Fish<10ppm<1ppm3mL per 25 gallons

100ml, 500ml, 1000ml


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