Absorbs pollutants and makes the water crystal clear. coal in pellets of vegetable origin activated in a gas oven and mechanically worked. the smaller the cylinders are, the more coal is performing. this type of carbon has a compactness alone a good filtration thanks to meso pores thanks to its structure with a diameter of about 2/3 mm and length from 10 to 15mm. the peculiarities of coal in the aquarium are varied- - chlorine removal - elimination of unpleasant odors - elimination of the yellowish color of the water - elimination of medicines after their use - elimination of heavy metals such as iron and lead - clarification of water does not eliminate nitrites, nitrates and ammonia technical sheet - water content - less than 8 percento. - ash content - less than 8 percento. - porosity - 1100 m2 per gram of product.- molecular composition - mori pores (retains impurities between 2 and 50 microns) - adsorbency (at iodine) - 1000 mg / g. - ph- 7-7.5. use - 0,7 / 1 kg for every 500 liters of water to be treated. change once a month. remove the carbon from the filter when using medicines, trace elements, fertilizers, liquid feed and marine supplements.