From industry firsts to industry standards, Marineland products are designed with both performance and style in mind. We push precision and power beyond the expected and listen to our loyal customers to make our products even better. We do this because at the heart of our innovative spirit is a desire to help hobbyists everywhere do more, create more and, most of all, enjoy more. So whatever your customers are passionate about — freshwater or saltwater, big or small, beauty or science — help them make their aquarium their own. Make it Marineland. Marineland Filter Foam for Canister Filters provides a large surface area for trapping particulate debris and enhances biological filtration. The filter foam can be rinsed and reused once every three weeks for a total of nine weeks. Remember to change your filter cartridge once a month or when you see a reduction in water flow, as well as change 25% of the water monthly.