Bio-Sponge® Filter Media for Cascade® Canister Filter Pumps, single-pack

definite requirment if buy the filter itself best to have extra then to have to run around looking for them or to have to have them overnighted if ordering online

These sponges work great! Fish tank keeps cleaner longer. Change as according to package and the fish tank stays cleaner longer.

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GREAT PRODUCT AND WE USE THESE MEDIUMS MONTHLY SO THIS IS A GREAT WAY TO SAVE A FEW DOLLARS, THANKS.

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these were poorly packaged, and slightly larger than what they should have been the edges are frayed but made it work in my sons tank, and everything seems to be going well

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Just an FYI, each package only contains 1 sponge (filter floss comes in a 6 pack). . . This perfectly fits the trays inside the cascade 1200 and 1500 canister filters. The sponge is quite coarse and will catch the biggest debris particles. However you'll want a tray or two loaded with filter floss to polish the water.

As for maintenance of the bio-sponge, there's really no reason to replace this product any sooner than once a year. To clean it: pour the old canister water into a bucket, then take and wring out this "biosponge" in there. Wash it off using the old aquarium water and once it's fairly clean, put the sponge right back into the filter. Don't use city tap water to wash this because the chlorine will kill the beneficial denitrifying bacteria.

I say 5 stars out of 5 because it perfectly fits the filter tray, the price isn't outrageous, and it will last a really long time.

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