HOBBY ZEOLITH 500G Scraper including a filter location that

including a filter location that ensures the water is circulated effectively

nitrite ions & nitrate ions rapidly for the purpose of removing poisonous ammonia

The filter light is not only waterproof

so they reach the fish quickly

Biochemical filtration

HOBBY ZEOLITH 500G Scraper including a filter location thatZeolith is a solid natural stone which contains many pores, cavities and channels. Hobby Zeolith works in an adsorptive manner, i. e. environmental toxins and decayed products are directly attracted and retained by the system of cavities through strong electrostatic fields (e. g. up to 90% of ammonia). Zeolith has a huge internal surface area. Approx. 10 gram corresponds to the size of 4 football pitches. The cavities are 4 millionths of a millimetre