Haquoss zeocarb 270gr activated carbon and zeolite is a mixture of special coal and zeolite. The carbon used is virgin and of vegetable origin main component gusci di noce di cocco activated with a gas oven and mechanically worked. The more granules are small, the more coal is performing the optimum is 3 to 5mm. The structure of this coal combined with its dimensions is optimal for micro filtration, facilitated by the micro pores of its structure. The zeolite used instead is a mixture of different types of zeolites, heat treated, crushed in granules from 3 to 5mm and composed of various minerals. This mixture contributes to break down, nitrites , nitrates , ammonia , phosphates , silicates and copper , all compounds harmful to aquatic life. These characteristics are added to the peculiarities of activated carbon.