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NYOS PHOSI-EX Phosphate and Silicate Adsorbing Filter Media - 500 mL

NYOS PHOSI-EX Phosphate and Silicate Adsorbing Filter Media - 500 mL


Item #: 6D92210

Temporarily Out of Stock

NYOS® PHOSI-EX is an high-performance, moist silicate and phosphate adsorber
  • Removes phosphate and silicate
  • prevents unwanted algae plagues
  • No emission of aluminium
  • Leads to crystal clear water
Technical Details
  • Content:500ml
  • Use: 150-200ml per 500 liters (125 Gallons)
  • Capacity: 1000-2000l sea water at 0.5mg/l phosphate
NYOS® PHOSI-EX is an extremely high-performance, moist and secure silicate and phosphate adsorber on an iron basis. The targeted use of PHOSI-EX will prevent unwanted algae plagues effectively and your aquarium will shine in all its glory.
  • Removes phosphate and silicate permanently, quickly and efficiently
  • Removes and prevents unwanted algae plagues
  • No change to the pH value
  • No emission of aluminium or other harmful substances
  • Leads to crystal clear aquarium water

NYOS® PHOSI-EX can be added directly to the aquarium circulation in a filter sleeve or between two layers of filter floss. The best results can be achieved with a vortex filter (e.g. from NYOS®). To begin with, use approx. 150-200 ml NYOS® PHOSI-EX per 500 litres of aquarium water. This amount can be increased in stages after a few days if required.

1000 ml NYOS® PHOSI-EX suffices for around 2000-4000 litres of sea water or around 4000-8000 litres of fresh water (with 0.5 mg/l phosphate).

Reef Chemistry Calculator

Use our chemistry calculator to find out how much you need to add to your aquarium.

Manufacturer information

The NYOS® Philosophy: Innovative. Intuitive. Uncompromising. Nature Inspired. NYOS®. Experience simple, nature-inspired marine aquarium care at the highest level.

1 Star


Reviewed on
March 02, 2021

No, I would not recommend this.

Utter garbage

Pros: None

Cons: Everything

Media to heavy to tumble properly exhausted within 48 hours utter useless back to the messy rowa I go

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Reviewed on
December 25, 2020

No, I would not recommend this.


Pros: Lesson learned

Cons: Way overpriced for the performance in my opinion

First off, big fan of the NYOS nitrate kit.

After using Rowaphos for many years, tried out this product.

It is hard as a rock (no moisture), will not tumble in a dedicated reactor, overpriced, and exhaust really fast.

Needless to say, just reordered Rowaphos.

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