Abstract: A sectionalized, integrated, aquarium is disclosed. A parallelpipedal housing is formed by two interlocking U-shaped members. The area thus formed is divided into two compartments--an aquarium compartment and a mechanical filtering chamber. The filtering chamber contains filters and a reservoir. The aquarium compartment contains a bottom filter. The sections are divided by a vertical wall which has internal plumbing members and serves as a conduit as well as a divider. Water enters the aquarium section from the reservoir through the vertical panel and piping. Water is released from the aquarium compartment to the mechanical filtering chamber by waterfall action through slots in the upper part of the vertical panel. Water is continually in circulation between the sections, being continuously aerated and filtered.