- Filter Media
Depending on which type, chemical filter media control the pH-value and the water hardness (peat) – or reduce the phosphate level and inhibit the growth of algae (phosphateout).
The pH-value of mains water lies between 7,3 and 7,8 and is therefore slightly alkaline. However, most ornamental fish require acidic water – that is a pH-value under 7,0. EHEIM TORFpellets lower the pH-value and reduce the water hardness.
Phosphates mainly occur due to organic pollutants in the aquarium water (fish remains, fish faeces etc.) and are responsible for the growth of algae. EHEIM phosphateout binds the phosphate and removes it from the water circulation.