The only treatments that have ever touched these are charcoal and dechlorinator. I don't have the instruction manual anymore but it is available if you go online. Size: 21" L x 10 1/4" H x 4 1/2 W. This item is in the category "Pet Supplies\Fish & Aquariums\Filters". The seller is "laurenv3691" and is located in this country: US.
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