Cad Lights 18G Mini-II Full Reef System Order today, ship out next business day. Brand New. Free 1 Extra filtration sponge. Included: 1) A 5mm Thick Ultra Clear Low-Iron 18-gallon Mini II aquarium (16 x 16 x 17) Glass Aquarium. 2) 3-chamber multi-stage reef/marine filtration system 3) 250-gallon silent pump and Glass canopy 4)USA Brand and 2 Years Warranty.