How often do you change the tiny clean and clear pad

I usually clean it every week to two weeks and change them every couple months.

where do you put the clean and clear cartridges in a fluval u3 internal filter

In the central part of the filter with the ceramic media

What's in them, how do they work?

It works like a sponge as it catches all the algae and debris.

Does one size fit all U series filters

I only know first hand that it fits in a u1 U2 and u3. Unsure of others.

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💧 Elevate your aquarium game with crystal-clear confidence!

LIGHTWEIGHT DURABLE - Crafted from premium polyester, combining durability with a sleek white finish.
EFFORTLESS MAINTENANCE - Extends the time between water changes so you can focus on what matters—enjoying your fish.
PRISTINE AQUARIUM VIBES - Keeps your tank water beautifully clear, making your aquatic space Instagram-ready.
PERFECT FIT ZERO HASSLE - Designed specifically for Fluval U1, U2, U3, and U4 filters for flawless integration.
POWERFUL FILTRATION BOOST - Works alongside Biomax media to supercharge your filter’s cleaning efficiency.

The Fluval U Internal Filters Clean and Clear Cartridge is a lightweight, polyester-made replacement cartridge designed for Fluval U1 through U4 filters. It enhances water clarity, extends intervals between water changes, and works in tandem with Biomax media to maintain a pristine aquatic environment.

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€ 14.33

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Slovakiastore

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Pet Type	Fish
Product Dimensions	5 x 8.5 x 15.5 cm; 24 g
Item model number	A499
Outer Material	polyester
Colour	White
Size	Clean&clear
Number of Items	1
Quantity	1
Batteries required	No
Batteries Included	No
Item Weight	24 g

Fluval U Internal Filters Clean and Clear Cartridge, White

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