Red Sea NO3:PO4-X Biological Nitrate and Phosphate Reducer
NO3:PO4-X effectively and naturally reduces nitrate and phosphate levels, curbing unwanted algae growth while finely tuning Zooxanthellae populations to enhance coral health, growth, and vibrant coloration.
Key Benefits
- Reduces nitrate and phosphate levels in marine aquariums
- Helps control excessive algae growth
- Supports optimal Zooxanthellae population balance
- Enhances coral health, growth, and coloration
Product Specifications
| Item | Value |
|---|---|
| Form | Liquid |
| Volume | 16.9 fl oz (500 ml) |
| Brand | Red Sea |
| Use | Marine aquarium water treatment |
FAQ
How does NO3:PO4-X work to reduce nitrate and phosphate levels?
NO3:PO4-X works through biological processes that naturally break down nitrate and phosphate in the water, supporting beneficial bacteria that help maintain a balanced ecosystem in the aquarium.
Can NO3:PO4-X be used in reef tanks?
Yes, NO3:PO4-X is specifically formulated for use in reef tanks to support coral health by regulating nutrient levels and promoting stable Zooxanthellae populations.
How often should NO3:PO4-X be added to the aquarium?
The frequency depends on water test results. Add according to nitrate and phosphate levels, typically every 2 to 4 weeks, or as recommended by your aquarium maintenance schedule.

Grace Burgess –
I’ve used NO3:PO4-X for three months now and noticed a significant drop in algae growth. My corals have become more vibrant and active. The product integrates well into my weekly maintenance routine and doesn’t alter water chemistry drastically.
Katherine Henderson –
It helps maintain stable phosphate and nitrate levels in my 125-gallon reef tank. I see less brown algae and my anemones are more colorful. A little goes a long way, and it’s easy to mix into the water.
Sally Carr –
After introducing NO3:PO4-X, my tank has had fewer algae outbreaks. The coral coloration has improved noticeably. I appreciate the natural approach—no harsh chemicals or additives.