Well, you don't pour it into the tank, it goes into your filter system and should be placed in a media container, sock, mesh bag or some other filter container. Questions such as how much carbon is needed in a tank and how often it should be changed can only be answered definitively by using it in your aquarium. This is because every aquarium is different and how they are maintained is different. Because of the individual differences in tanks, these guidelines are, at best, educated guesses.
Date published: 2016-08-29