The most effective biological filter media.

A very porous filter medium made from glass (therefore environmentally friendly). It acts as a sponge for micro-organisms. Waste products and harmful substances are decomposed thanks to aerobic (high oxygen) and anerobic (low oxygen) filter process.

With Superfish Crystal Max you achieve the best performance per litre of filter volume!

800ml (1 box) is sufficient for a 160L aquarium and larger quantities give better results so you may wish to consider two boxes.

Use with any external filter and is popular for Eheim filters.

Tip: Place Crystal Max is a filter bag for convenient cleaning.

Check out some of the other Superfish media's that are commonly purchased together.