Red Sea

NO3:PO4-X Nitrate & Phosphate Reducer - Red Sea

Grouped product items
Product Name Qty
500mL NO3:PO4-X Reducer - Red Sea

SKU: 208218

In stock


Earn 20 Reward Points

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1000mL NO3:PO4-X Reducer - Red Sea

SKU: 208219

In stock


Earn 32 Reward Points

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5000mL NO3:PO4-X Reducer - Red Sea

SKU: 210940

In stock


Earn 118 Reward Points

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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

  • 500mL
  • 1000mL
  • 5000mL


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 Type


NO3 Level


PO4 Level

Average Daily

Dose of NO3-PO4-X

Mixed Reef 1-2ppm 0.08 - 0.12ppm 2mL per 25 gallons
SPS Frags 1-2ppm 0.08 - 0.12ppm 2mL per 25 gallons
SPS Dominant 0.25 - 0.5ppm 0.01 - 0.02ppm 1-2mL per 25 gallons
Ultra Low Nutrient SPS 0ppm 0ppm 1-2mL per 25 gallons
Marine Fish <10ppm <1ppm 3mL per 25 gallons
More Information
Product Name NO3:PO4-X Nitrate & Phosphate Reducer - Red Sea
SKU Red Sea NO3:PO4-X Nitrate And Phosphate Reducer
Vendor Red Sea
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