Add-On Cartridge for Lifegard Aquatics All-in-One® Pond Filter Systems Cartridge Option:Cartridge with Double Locking Assembly Upon discovery of infection

Upon discovery of infection

allowing nitrifying bacteria to rapidly colonize the filter

A natural flavor and taste Koi love

5" x 12" 3/8" Barb 1

Dicalcium Phosphate

Add-On Cartridge for Lifegard Aquatics All-in-One® Pond Filter Systems Cartridge Option:Cartridge with Double Locking Assembly Upon discovery of infectionThis add on cartridge for Lifegard Aquatics All in One Pond Filter Systems will increase the filter capacity by adding an additional filtration layer. Note: The foam filters are included, but you will also need a new locking assembly as the one you have now will not fit over two filter chambers. Please notice carefully the purchase options and choose the one that is right for you.