Ready-to-use nylon mesh filter bags filled with activated carbon that removes harmful chemicals, toxins, odors, discolorants, and other contaminants, leaving your aquarium water crystal clear.Convenient, no fuss, and disposable.Fits all Penn-Plax Cascade Canister Filters along with Eheim ECCO, Eheim Pro and Pro II, AquaClear 500, and FilStar Canister filters.
