These activated carbon pellets are used to adsorb toxins, pollutants, heavy metals, unpleasant odours and contaminants from the air and your aquariums. Thanks to the high purity of our activated carbon, it works quickly and efficiently. Compared to other air refreshers and chemical filter options, the advantage of using activated carbon is that no power is needed and no harmful chemicals are used. The activated carbon pellets are especially suitable for those who pursue an environmentally friendly lifestyle.