Red Sea NO3 PO4 Reducer 500 ml

Red Sea’s NOPOX-based reducer lowers nitrate and phosphate in reef tanks, helping curb algae and support healthier, more stable coral growth.

Highly effective, controlled, biological reduction of nitrates and phosphates for all reef and marine fish systems. Promotes coral growth and coloration.

• Controllable and safe nitrate & phosphate reduction.
• Sets and maintains ongoing desired levels of nitrate and phosphate.
• Promotes coral growth and coloration.
• Reef Safe, no undesirable side effects.
• Easy to use, reliable and cost effective.

Red Sea NO₃ PO₄ X is a unique complex of carbons that are used by nutrient reducing bacteria. Each carbon in the complex is utilized by different strains of microorganisms while ensuring the specific Carbon, Nitrogen, Phosphorus ratio required for each stage.

The Red Sea NO₃  PO₄ X complex includes other organic-bonded elements that are important stimulators in each stage of the reduction process. These metal and non-metals elements ensure steady bacterial propagation, complete nitrate reduction to nitrogen gas as well as the absorption and utilization of phosphate by the bacteria.

NO₃: PO₄ -X is easy to use, with a relatively small dose being added to the system on a daily basis. Over time the daily dosage of NO₃: PO₄ -X will be varied (see instructions for use) according to measured levels of nitrate and phosphate, giving the fine control of nitrate and phosphate levels that guarantees the gradual changes and accurate maintenance of the desired nutrient levels.

Prevents nuisance algae and enables control of zooxanthellae for optimum coral growth and coloration.

Part of managing nitrate and phosphate levels — see our guide to Nitrate & Phosphate for why these two parameters are tracked together.

Returns & Replacement

Returns are accepted within 7 days of delivery, provided the item is unused and in its original packaging. Manufacturer-sealed items cannot be returned once the seal is broken, and sale-priced items are not refundable.

If your item arrives defective or damaged, message us on WhatsApp with your order number — or email us, if you would rather — and we will replace it. Approved replacements are delivered within 3 to 5 business days. Transit damage is covered by insurance on every shipment. If tracking shows delivered but nothing reached you, tell us within 72 hours, which is the reporting window Indian couriers allow. Damage caused during installation or use is not covered; replacement spares for such cases are chargeable.

Full terms are on our Cancellation & Returns page.