Big Blue
One Stage 20" Big Blue with CTO Carbon Block filter, 1" NPT Ports. includes: - 1 x 20"x 4.5" Big Blue filter housing with pressure release - 1 x 20"x 4.5" Activated Carbon Block filter -...(click on product image for more details)Granular Filter for Big Blue
GAC 10" T33 Granular Activated Carbon Filter - Size 24.5" x 19 7/8" · Remove Chlorine, Turbidity, Bad Taste & Odor, Sediment, Dirt, and THMS from water. · Thick Wall Coconut Base...(click on product image for more details)Big Blue
Water Filtration is extremely if you live in an area that Chlorinates thier water. Chlorine is extremely harmful to your koi, and removal is necessary. At the turn of the century it was realized that adding chlorine gas as a disinfectant to drinking water reduced the incidence of waterborne disease in humans. Chlorine continues to be used as a disinfectant in water mains and koi keepers need to be aware of it's harmful effects.