A high quality filter carbon. It is recommended for short-term use in freshwater aquariums.

A completely neutral filter wool. The fine phenol free structure of this synthetic material traps tiny particles of dirt. It should be loosely placed as the last layer in your filter arrangement.

A coarse mechanical filter material which is to be used as bottom layer filtering. Its hollow ceramic design creates eddies which disburse the water into many paths. It traps large debris while creating an even flow of water for subsequent layers.

To create biologically sound water as found in nature, you need EHFISUBSTRAT. Biological filtering is based on a natural decomposition of harmful substances using helpful bacteria. They convert ammonia and nitrite into relatively non-toxic nitrate. The efficiency of biological filtration is limited by the media that bacteria are growing on. With over 450 m² per litre (22, 000sq. ft. per lmp. gal. / 18, 3000 sq. ft. per U.S. gal.) EHFISUBSTRAT is a specially designed sintered glass. Bacteria are able to stick better to a surface which has a complex pore system. EHFISUBSTRAT has been specially developed to offer optimum sites for bacteria colonization. The effectiveness of these bacteria is linked to how much oxygen and toxins can flow by. With faster decomposition of toxins compared to other media. Highly effective, economically priced, it is the best biological media available to aquarium hobbyists.

A naturally occuring porous volcanic rock which is ideal for biological filtration where large debris is present such as ponds and highly stocked aquariums. This natural product is pre-tested for impurities before packaging to ensure that it is free of toxins.