The Aqueon Filter cartridge eliminates mechanical and chemical debris in your aquarium. Easy-to-replace cartridge contains over 25% more activated carbon than similar filter cartridges.[]More detail ...

These are the replacement filter cartridges for the Eclipse System Three the Eclipse Explorers and the Eclipse Hex 5 tanks. Each cartridge contains 1 oz of super activated carbon. Just shake rinse and install. Ensures even carbon distribution and no water bypass. For best results change monthly. 3 Pack Rite-Size Cartridge: Z Size: 3"long x 4 1/2"wide x 3/4"thick

• Rite Size Z


• 3pk


• OEM cartridges

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The Aqueon Power Filter cartridge eliminates mechanical and chemical debris in your aquarium. Easy-to-replace cartridge contains over 25% more activated carbon then similar filter cartridges.

• Ready-to-use preassembled filter cartridges install in seconds


• Helps create crystal-clear healthy water


• Patented dual-sided replaceable dense-floss cartridges filter out more particles and debris


• Cartridges contain more activated carbon to remove toxic impurities odors and discoloration


• For best results replace cartridge every 4-6 weeks

More detail ...

The Aqueon Power Filter cartridge eliminates mechanical and chemical debris in your aquarium. Easy-to-replace cartridge contains over 25% more activated carbon then similar filter cartridges.

• Ready-to-use preassembled filter cartridges install in seconds


• Helps create crystal-clear healthy water


• Helps create crystal-clear healthy water # # Patented dual-sided replaceable dense-floss cartridges filter out more particles and debris


• Cartridges contain more activated carbon to remove toxic impurities odors and discolorationCartridges contain more activated carbon to remove toxic impurities odors and discoloration


• For best results replace cartridge every 4-6 weeks

More detail ...

The Aqueon Power Filter cartridge eliminates mechanical and chemical debris in your aquarium. Easy-to-replace cartridge contains over 25% more activated carbon then similar filter cartridges.

• Ready-to-use preassembled filter cartridges install in seconds


• Helps create crystal-clear healthy water


• Patented dual-sided replaceable dense-floss cartridges filter out more particles and debris


• Cartridges contain more activated carbon to remove toxic impurities odors and discoloration


• For best results replace cartridge every 4-6 weeks

More detail ...

Great - but a warning

The Penguin Bio-wheel pumps are great: quiet effective and long-lasting. (I have a 170 filter in a 39 gallon tank.) These size C filters are widely available but the Amazon price is much lower than at my not-so-nearby pet store.



A word of warning. The day after changing my filter three months ago fish started dying. Next morning my 6" long Plecostomus was dead. Then three Clown Loaches each about 5 " long. Within a week I had lost 18 of my 20 fish. Yet there was no sign of disease.



A water test and much internet searching finally pointed out what I had done wrong. I had neglected my tank for a few weeks. In a rush to catch up I siphoned out about 30 percent of the water (more than usual) did a "better" than usual job of siphoning up detritus from the gravel. Then - my biggest mistake - I replaced the Penguin filter too! The result is the water chemistry changed too quickly. The Nitrates spiked to a deadly level. My tank healthy for more than two years needed to be started over. Took two months and many water changes before I could safely add new fish.



I visited perhaps a dozen "fish forums" and only one had a comment saying "don't change filters when you do a water change.' The Penguin filters and the box they come in carry no warnings. What I (and you) should do is simple: space your water changes and filter changes a week or two apart.



Now knowing how important the "aged" filter is (especially in a tank like mine with no under gravel filter) I've started this habit: there's just enough space to get a second filter flat against the old filter. After a couple of weeks I remove the older filter and put the newer one - by now doing some biological filtering - in its place. That way the tank is never depending on only a new filter. For larger tanks (say 55 gal and up) the 330 or 350 Penguin pump holds two filters side by side so just change one filter at a time.



Hope this helps you avoid the disaster that hit my tankMore detail ...

Aqueon Replacement Filters

They are great and they came right on time.Actually they camebefore they were duebut I was using my last filter when they came.Thank you!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 ...