75 Sq Ft Cartridge with Plug $191.99 75 Sq Ft Cartridge with Bypass Valve $191.99 75 Sq Ft Cartridge with Bypass Valve and 10 Tablet Brominator $214.99 100 Sq Ft Cartridge With Plug $201.99 100 Sq Ft Cartridge with Bypass Valve $201.23 100 Sq Ft Cartridge with Bypass Valve and 10 Tablet Brominator $233.99