Seachem PhosNet - 250 g
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Product Information
Full details
Seachem PhosNet is designed for freshwater and saltwater aquarium hobbyists looking to maintain pristine water quality by effectively removing phosphates and silicates. Its high-porosity granular ferric oxide (GFO) provides a massive surface area for rapid contaminant binding, ensuring they are trapped permanently without leaching. While it is a powerful tool for controlling unwanted algae growth, it requires careful handling and consistent monitoring to prevent rapid fluctuations in water chemistry that could stress sensitive livestock.
All features
| Brand | Seachem |
|---|
Extended Product Information
FAQs
Can I use PhosNet in a reef tank?
Yes, PhosNet is perfectly safe and highly effective for use in both freshwater and marine reef aquariums.
How often should I replace the media?
Replace the media when your phosphate test kits indicate that the concentrations are beginning to rise, as the binding capacity will have been exhausted.
Do I need to soak the media before use?
You do not need to soak it, but it is critical that you rinse the media thoroughly before placing it in your filter to remove any loose particles.
Can I reuse the media once it is exhausted?
No, once the binding capacity of the granular ferric oxide is reached, it cannot be recharged and must be replaced with fresh material.
Will this affect my water pH?
PhosNet is pH neutral and is designed to have minimal impact on the overall water chemistry, specifically focusing on the removal of silicates and phosphates.
Troubleshooting
Phosphate levels remain high after installation
Ensure the media is placed in a high-flow area; if water bypasses the bag, it will not be effective. Check that the bag is not packed too tightly.
Water appears cloudy after adding the media
This is likely due to residual dust; remove the bag, rinse it thoroughly until the water runs clear, and ensure it is secured properly.
Rapid drop in nutrient levels
If your corals or fish appear stressed, reduce the amount of PhosNet used and transition to a smaller, more gradual quantity.
Pros and Cons
Pros
- Significantly less dust compared to competing GFO products
- Does not release captured phosphates back into the water
- Highly effective for both saltwater and freshwater setups
- High-porosity granules provide excellent contact time
Cons
- Requires a fine mesh bag for proper containment
- Needs regular testing to avoid over-stripping nutrients
- Best performance requires specific high-flow placement
Setup, Compatibility & Care
To prepare PhosNet for use, always rinse the granules thoroughly under tap water or deionized water to clear away any residual fines that may have settled during transit. Once rinsed, place the material into a fine mesh bag, ensuring the bag is large enough to allow for slight movement of the granules if placed in a reactor.
For optimal maintenance, place the bag in a high-flow section of your filter. It is essential to test your phosphate levels regularly using an aquarium test kit. Because PhosNet is highly effective, you may find that you need less than the maximum recommended dosage to keep levels within a target range. Replace the media when you notice phosphate levels beginning to rise again, indicating that the binding sites have reached capacity.