Perfect for Mini Aquariums Kritter Keepers and even large fish bowls. This economical new concept in mini filtration offers the consumer the ability to discard the entrie filter each month and replace it with a new filter. The filter consists of carbon zeolite and foam. Carbon and zeolite help to keep the water crystal clear. The foam filters out free floating particulate. Filter attaches securely to the back (or side) of the tank with suction cups. Packaging 1/Blister card.