Need to check your phosphate levels

Double ring design

offering rapid relief from compulsive licking and scratching

Easy to use and less mess

or you prefer to measure your parameters on a more in-depth scale

Marineland Micron Cartridge, Fits Magnum Canister Filters 3 Lbs Guinea Pig Food Need to check your phosphateBrand MarineLand Material Cotton Compatible Devices Marineland Magnum, Marineland HOT Magnum Reusability Disposable Number of Pieces 1 About this item For the Magnum and HOT Magnum canisters Unique filtration 1 Pack For the Magnum and HOT Magnum canisters Unique filtration Foam sleeves and other parts From the manufacturer Micron Cartridge For the Magnum and HOT Magnum canisters Unique filtration 1 Pack