The CITR In-Tank Refugium is a "safe house" that provides a protected area to help newly added fish or invertebrates easily acclimate to a new tank while also providing a place for injured fish or corals to regenerate damaged tissue without the need for a separate quarantine tank.

The CITR also functions as a culturing area for small organisms that are intended to be provided as a food source for the inhabitants of the main portion of the tank. Included with the CITR is a Rio Power head that provides the necessary circulation to keep fresh water moving through the CITR at all times. The versatility and easy use of the CITR make it a valuable addition to every aquarist's tank.