Do the u3 and u4 use the same?

The u4 is longer than the u3 cartridge , you could use a u3 in a u4 but it would just be a bit short in the cage that holds it

Do the u3 and u4 use the same?

No they are different sizes, hope that answers your question

how many poly/carbon cartridges in a box?

Hi there are two carbon cartridges in the box. I find them a great asset to my tank and keep it clean.

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💧 Elevate your aquarium game with Fluval’s ultimate clarity boost!

TAILORED FIT - Custom-designed exclusively for Fluval U4 Filter for seamless performance
VERSATILE USE - Perfect for freshwater, marine, and reptile habitats—one cartridge, endless possibilities
CRYSTAL CLEAR RESULTS - Effectively traps fine debris and removes impurities for sparkling aquariums
DUAL ACTION FILTRATION - Combines chemical and mechanical filtration for pristine water quality
HASSLE FREE MAINTENANCE - Quick and simple replacement keeps your aquatic environment flawless with zero downtime

The Fluval U4 Filter Carbon Cartridge is a precision-engineered 2-in-1 filtration media designed exclusively for the Fluval U4 Underwater Filter. It efficiently removes odors, toxins, and fine debris to deliver crystal clear water, suitable for freshwater, marine, and reptile tanks. Lightweight and easy to replace, it ensures hassle-free maintenance and optimal aquatic health.

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224 DH

Duties & taxes incl.

Moroccostore

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Pet Type	Fish
Product Dimensions	7.11 x 7.11 x 4.57 cm; 51 g
Item model number	A492
Colour	Mehrfarbig
Size	2.4 x 0.6 x 3.4 cm
Number of Items	1
Quantity	1
Compatible Devices	Fluval U4 Underwater Filter
Batteries required	No
Batteries Included	No
Item Weight	51 g

Fluval U4 Filter Carbon Cartridge

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