Boyd Chemi Pure Blue Grande 44ozTHE BENEFITS OF USING CHEMI PURE BLUE: Treats 300 Gallons Superior filtration for Reef, Marine, Jellyfish, & High pH Freshwater Aquariums Now featuring QuickWash Carbon, a special 0. 8mm extruded pelletized activated carbon that has 30% more surface area than our original carbon New carbons structure is harder, cleaner and reduces the potential of HLLE developing in your fish due to fine carbon dust particles Contains two high grade hybrid ion