Penn Plax Cascade Nylon Filter with Biological Ceramic Rings

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Feature

Convenient, Ready-To-Use Filter Bags For Use With Your Cascade Cannister Filter
Contains Bio-Ring Biological Ceramic Rings To Remove Ammonia & Nitrites
Filter Media Fully Enclosed In A Disposable Nylon-Mesh Bag
Package Dimensions: 5.0" L X 2.5" W X 7.5" H