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 flawless clarity and less upkeep!

LIGHTWEIGHT DURABLE - Compact polyester construction ensures long-lasting performance without bulk.
EFFORTLESS MAINTENANCE - Reduces water change frequency, saving you time and hassle.
SEAMLESS COMPATIBILITY - Designed specifically for Fluval U1, U2, U3, and U4 filters for perfect fit.
BOOST YOUR FILTERS POWER - Works alongside Biomax media to enhance filtration efficiency.
CRYSTAL CLEAR WATER ALWAYS - Maintains pristine aquarium clarity for a stunning aquatic display.

The Fluval U Internal Filters Clean and Clear Cartridge is a lightweight, polyester filter cartridge designed to keep aquarium water beautifully clear. Compatible with Fluval U1 through U4 filters, it extends the interval between water changes and enhances filtration when used alongside Biomax media, ensuring a healthier aquatic environment with minimal maintenance.

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Pet Type	Fish
Product Dimensions	5 x 8.5 x 15.5 cm; 47 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	47 g

Fluval U Internal Filters Clean and Clear Cartridge, White

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