Third party data processing

To improve our offer, we have information about user behavior by third parties processed.
Here we offer you the opportunity to individually agree to each individual data processing by third parties. Privacy

Essential cookies

Cookies, which are necessary for the proper operation of our shop.

Google Analytics

Analyzes website usage to deliver custom content.
Performs analytics to optimize website functionality..

Cookie lifetime: 2 years

Google Analytics eCommerce

Conversion tracking with the Google Analytics eCommerce extension.

Type of storage

May we save your settings permanently in the form of a cookie in your browser?
Otherwise, the settings will be lost when you close the browser window.


Nyos Phosi-Ex 500 ml

Nyos Phosi-Ex 500 ml

Phosphate and Silicate removal media

  • removes phosphate & silicate
  • removes & prevents algae plagues
  • no release of aluminium
  • provides crystal clear water
  • Manufacturer:Nyos
  • Item number:156121
26,90 €

including 19% VAT ,

Recommended retail price: 26,90 €

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.

The advantages at a glance:
  • removes phosphate and silicate permanently, quickly and efficiently
  • removes and prevents unwanted algae plagues
  • no change to the pH value
  • no release of aluminium or other harmful substances
  • provides crystal clear aquarium water

NYOS® PHOSI-EX can be added directly into the aquarium circulation in the filter sleeve or between two layers of the filter foss. The best results can be achieved with a fluidized reactor. Start by using approx 150 - 200 ml (5-7 oz.) NYOS® PHOSI-EX per 500 l (125 gal) of aquarium water. This amount can be increased in stages after a few days if required.


1.000 - 2.000 l marine water at 0,5 mg / l phosphate

Do not rinse out before use. Any brownish-red clouding of the aquarium water that may occur is completely unproblematic. Do not overdose; monitor the phosphate value regularly during use (e.g. with Nyos Phosphate test kit). Always undertake changes to the aquarium slowly. 1000 ml (34 oz.) NYOS® PHOSI-EX suffices for around 2000 - 4000 l (400 - 800 gal) of seawater (with 0.5 ppm phosphate). Not suitable for human consumption.

Other customers have also bought the following items
Ocean Nutrition Green Marine AlgaeOcean Nutrition Green Marine Algae
starting from 6,30 €
Ocean Nutrition Formula 2 FlakesOcean Nutrition Formula 2 Flakes
starting from 6,10 €
Ecotech Marine VorTech QD PumpeEcotech Marine VorTech QD Pumpe
starting from 369,00 €
Ecotech Marine Coral GlueEcotech Marine Coral Glue
starting from 18,90 €
Nyos Zeo 1.000 mlNyos Zeo 1.000 ml
10,90 €
Ocean Nutrition Prime Reef FlakesOcean Nutrition Prime Reef Flakes
starting from 6,10 €
Nyos Torq G2 BodyNyos Torq G2 Body
starting from 64,90 €
Nyos Zero 250 mlNyos Zero 250 ml
26,90 €
Ocean Nutrition Formula 1 FlakesOcean Nutrition Formula 1 Flakes
starting from 6,10 €