Mix the same live filtration bacteria as the "Best BioBlock" Quickly dissolves dirt with the power of activated carbon and bacteria The main body is a smoke color that is inconspicuous in the Perfect for gardening goldfish in an aquarium, which is easy to stain. Easy to change filtration.
When using chemical such as fish pesticides, please be aware that the activated carbon in the filtration material adsorbs the active ingredients of the chemical and will lose its effectiveness. There may be black powder from the filtration, but this is a powder of activated carbon. Please place the air pump above the aquarium. When set to a lower position, water in the aquarium may be returned into the air pump