API Phos-Zorb Pouch – Size 6
Keep your aquarium free of phosphate and silicate with the API Phos-Zorb Pouch. Phosphate, found in fish waste, tap water, and decaying organic matter, can cause cloudy water. Silicate buildup can lead to brown algae patches. The Phos-Zorb Pouch is scientifically proven to remove both phosphate and silicate, resulting in crystal-clear water.
It supports coral growth in saltwater tanks and helps freshwater plants thrive by removing excess nutrients that inhibit plant development.
Specifications
| Component | Details |
|---|---|
| Water Treatment Capacity | Up to 55 gallons |
| Target Nutrients | Phosphate (above 0 ppm / mg/L), Silicate (above 0.5 ppm / mg/L) |
| Usage | Insert into filter or use as a standalone treatment |
FAQ
How often should I replace the Phos-Zorb Pouch?
Replace the pouch when phosphate or silicate levels exceed the recommended thresholds, typically every 4 to 6 weeks depending on tank conditions and bioload.
Can I use Phos-Zorb in both freshwater and saltwater tanks?
Yes, Phos-Zorb is effective in both freshwater and saltwater aquariums. It helps control phosphate and silicate, supporting plant growth in freshwater and coral health in saltwater.
Does Phos-Zorb affect water pH or hardness?
No, Phos-Zorb does not alter water pH or hardness. It specifically targets phosphate and silicate without impacting other water parameters.

David Walsh –
I’ve used this pouch for three months in my 55-gallon freshwater tank. The water has stayed clear without algae issues. My aquarium plants are growing better than before. Easy to install and effective.
Joshua Peters –
Works well for reducing phosphate levels. I noticed fewer brown algae patches after using it regularly. It’s a simple solution that fits into my filter system without any hassle.
Jake Russell –
My saltwater tank has had better coral growth since I started using Phos-Zorb. The water clarity improved significantly, and I no longer see silicate buildup.
Warren Jones –
Used it once a month based on test results. The water stays clear and my plants are thriving. It’s a reliable product for maintaining stable water chemistry.