CPR Aquatic In-Tank Refugium, Pro Large (CITRPROLG) The CITRPROLG 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. The CITRPROLG does NOT include a circulation pump. If you have ample circulation in your tank, you will not need a circulation pump. 11-3/4" Wide X 8" Tall X 5-3/4"" Deep Includes a sliding bracket that holds the Refugium on the edge of the tank