External Filter Media

This unique, specially patented filter medium for chemically filtering and purifying both fresh and saltwater aquaria. PolyFilter will remove excess nutrients, toxins and unwanted pollutants. Also ideal for copper removal from marine tanks

 

Hollow ceramic cylinders for mechanical filtration. Traps solid dirt at the water inflow and ensures an even flow of water through the filter. It is placed as first layer of the filter.

Specially-designed sintered glass with an enormous surface area of 450 m2 per litre. Ideal for the colonisation of nitrifying bacteria colonies. When changing the filter material, mix about 1/3 of the used medium with new to achieve rapid repopulation of bacteria. We recommend that this media once in use should be lightly rinsed in used tank water only. EHFISUBSTRAT must be washed thoroughly before use.