15 gal Refugium- Sump -Wet/Dry - Aquarium Filter - 24x9x15 High 24x9x15 high 3 Baffles - 4 Chambers Input Chamber - 8 inch for small skimmers and sock option. Refugium Chamber - 8" with a 10" high wall 3rd chamber 1.5 inch bubble trap Return Chamber - 6" - Fits most internal pumps