At Marineland we design our filter cartridges to meet the absolute highest standards of water purification performance and operational ease. Each pre-assembled cartridge slides easily into place providing superior mechanical and chemical filtration and making replacement fast dry and effortless. The cartridge mechanically filters water through a pad of double thick poly-fiber. Debris and waste particles are trapped and water is chemically filtered through Marineland’s Black Diamond Premium Activated Carbon.

• Fits Eclipse 2 and Eclipse 3


• Inside the cartridge a patented ribbed backing ensures the even distribution of activated carbon to deliver maximum


• Designed specifically for horizontal placement in our extensive selection of eclipse systems


• Color coded packaging ensures fool-proof cartridge selection

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Fits Penguin 170 200 330 and 350 filters.[]More detail ...

Price is great. Make sure to re-use....

Compared to PetsMart this should save you a few dollars. Also don't be so quick to throw these guys away with the Eclipse tanks. We've noticed that the tanks filtration system has a pretty solid vacuum so you'll notice that these cartridges will get dirty after about 4-5 days. Don't worry because it's just the top layer. Pull the cartridge out and scrub the surface with a new toothbrush from your dentist. You know? The cheap ones they give you after you've paid for a teeth cleaning. This should get you a few extra days.More detail ...