HydroLogic Big Boy De-Chlorinator with KDF Carbon FilterTrails Location: In Store Location: @Garage HydroLogic Big Boy De Chlorinator with KDF Carbon Filter The HydroLogic Big Boy offers big time water purification. Whether connecting to water mains to filter water in the house, or using the optional Garden Hose Connection Kit to make it a stand alone unit to fill reservoirs, get clean water faster and at higher volumes than ever before. This model's included KDF85 Carbon Filter adds even more filtering