Alexapure Pro Water Filters - 4 Pack aquarium controller Weight without case: 56

Weight without case: 56

Store with protective cap filled with pH storage/reference solution to prevent membrane drying

Once the Black Berkey™ Element is completely saturated with water

If you need to replace a filter

Alexapure Pro Water Filters - 4 Pack aquarium controller Weight without case: 56Four Times the Filtration Power With the capacity to hold up to four filters at once, this four pack of Alexapure Pro Genuine Replacement Filters will keep your water flowing at an optimal speed. Or, if you're satisfied with using one or two filters at a time, you can store this pack as backup for when your filters need a change! Safer, Cleaner Water That Just Tastes Better With the Alexapure Pro Water Filtration System, you get safer, cleaner water