4 Pack Micron Filter Cartridges Compatible with Marineland Magnum ML90770 Canister Filters & Magnum Canister Filters for Freshwater and Saltwater Aquarium Water PolishingBrand: HAVANSIDY Features: Perfect Fit: These micron filter cartridges are highly compatible with Marineland Magnum and HOT Magnum Canister Filters, serving as direct replacements for PA0140 Powerful Filtration: These aquarium polishing filters use micro porous polyester fibers to trap dust, enhancing water clarity and creating a healthy aquatic environment Usage and Precautions: Rinse the Cartridge before installation. After 24 hours, reduce flow