Description

This product comes in two different varieties- blocks and spheres.

A ceramic material that provides an open flow and a huge surface area to promote the growth of helpful bacteria in your tank. 

It s efficiency in comparison with it s size is unmatched by any other bio-filtration media on the market- and the micro porous surface means that two blocks have a surface area of a whopping 2160 square inches!

Wow!

Works in sumps, external filters, trickle filters or even directly in the tank!