Aquarium filters

There are different types of filters available on the market - external, internal, filtering matherials closed or open (such as sponge filter on the picture above). The main criteria which help to select right filter is the capacity of your aquarium and amount of plants and fish in the aquarium. The main factor is the efficiency of the filter or the amount of filtered water per hour. To learn more about the filtration go you to an article about aquarium water filtration