Home/FILTRATION & MEDIA/FILTRATION/CLIP-ON/C/C4 Power Filter, up to 70 US Gal (265 L)

C4 Power Filter, up to 70 US Gal (265 L)

Item #: 14003 | UPC: 15561140034
Format: 8.5 L X 6.5 W X 9 H" (21.59 L X 16.51 W X 22.86 H cm)
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Fluval C-Series is the world’s first and only 5-Stage clip-on power filter that offers two mechanical phases, a chemical phase and a two biological phases for amazing water clarity.

  • Designed for aquariums between 40 and 70 gallons
  • Two Mechanical stages trap large and fine debris – foams easily slide out for quick cleaning
  • Chemical stage with activated carbon effectively removes toxins
  • Biological stage features Bio-Screen pad – blocks debris and provides massive surface area for beneficial bacteria growth
  • Biological Trickle Chamber – super charged for fast and efficient nitrification when loaded with Fluval C-Nodes
  • Patented refiltration control system permits slower water output to protect delicate fish/plants and increase contact time with media
  • Independent filtration stage management – changes can be made at different times while maintaining continuous biological activity
  • Cleaning indicator notifies user when polyfoam needs rinsing
  • Made in Italy
  • For use in freshwater and saltwater aquariums
Item #
Aquarium Capacity30 US Gal
(115 L)
50 US Gal
(190 L)
70 US Gal
(265 L)
Filter Circulation
119 US Gal/h
(450 L/h)
153 US Gal/h
(580 L/h)
264 US Gal/h
(1000 L/h)
Filter Circulation
106 US Gal/h
(400 L/h)
127 US Gal/h
(480 L/h)
238 US Gal/h
(900 L/h)
5 W5 W5 W
5 W5 W5 W
(L x W x H)
7 x 5 x 6"
(17.7 x 12.7 x 15.2 cm)
7 x 5 x 7"
(17.7 x 12.7 x 17.7 cm)
9 x 6.5 x 8.5"
(22.8 x 16.51 x 21.5 cm)
  • Poly/Foam
  • Activated Carbon
  • C-Nodes
  • Bio-Screen Pad


To register your warranty on line or for more information on this and other products go to: www.hagen.com The Fluval C Filters are guaranteed against defects in material or workmanship under normal aquarium usage and service for 2 years. We offer a 2 year guarantee on all non-replaceable parts which means that the filter will be repaired or replaced at the manufacturer’s discretion, free of charge, when the complete pump is returned with proof of purchase and postage paid. This warranty does not apply to any filter that has been subjected to misuse, negligence, or tampering. No liability is assumed with respect to loss or damage to livestock or personal property irrespective of the cause thereof.


C SERIES2019-03-07T16:09:55-05:00



How do I prevent baby fish from being pulled into my filter?

Make an incision in the center of a coarse, open cell foam filter block and insert the siphon tube strainer into it. We recommend rinsing the block every 2 weeks to ensure proper filtration performance.

I change the carbon in my filter every couple of weeks. Is this too often?

No. It’s better (and easier) to prevent odors rather than having to remove them once they’ve accumulated. Some fish are messy eaters, or are more prone to producing large amounts of waste, so prevention is key.

What general maintenance tips do you have for this filtration series?

Do you have any tips for fixing common filtration issues?

Aquatic expert Tom Sarac discusses the 6 most common filter problems, while providing helpful troubleshooting tips to resolve them.

I found a fish stuck to the intake of my filter. Is the flow too strong?

You don’t need to be concerned about your filter being too powerful for use with healthy fish, many of whom swim in natural habitats with much stronger currents. If a fish became stuck to the intake of your filter, it’s likely that the fish was already sick. Take note that you can adjust the filter output strength to suit your particular fish species.

How do I know when it’s time to change my filter media?

Can’t Find an Answer?

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