Re-fillable 10"x 4.5" (BB) Empty cartridge. Suitable for a whole house style housing in the Big Blue/Big White style but in the short version of 10".
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Re-fillable 10"x 4.5" (BB) Empty cartridge. Suitable for a whole house style housing in the Big Blue/Big White style but in the short version of 10" x 4.5". This cartridge is a great option to either fill with your own media, Granular carbon or coral sand/Calcite.
