does anyone have the exact measurements for the X large + Medium filters? Thanks

Must be a secret - I sure don't understand why the seller doesn't clearly list the size.Whisper Bio-Bag Filters are slightly tapered in the drawing. Width dimensions are at the top.Large: 4.6 wide x 6.4 tallMedium/"Junior": 3.0 wide x 5.2 tallSmall: 2.1 wide x 3.8 tallFound dimensions on the Tetra website but not sure the link address will work here. Here is the PDF file link:http://cdn.spectrumbrands.com/~/media/UPG/Tetra/Aquarium/Equipment/Replacement%20Filter%20Cartridges/WhisperCartridges.ashxIf this doesn't work go to their website at: www.tetra-fish.com and search for "Tetra Whisper Unassembled Bio-Bag Filter Cartridges"

Does it fit topfin power filter 10?

I bought these about a month ago for my top fin 10 filter. The cartridge in my top fin 10 is angled inward at the bottom whereas this filter cartridge is more of a rectangular shape. Due to the shape it does not fit the top fin 10 slot. However I kept my old cartridge frame and I'm using this product, everything works great.

What is the difference between the 26164 and ATS26164? Both seem to be 12 large Whisper filter cartridges.

Hi, I use the Medium size whisper filter cartridges...the difference between the 26164 & ATS26164 could be the fact that one is a pre-assembled cartridge and the other is not. I buy the 12 pack of unassembled filters which are quite a bit cheaper and are the identical product. It comes with the white filters, one plastic insert, and small charcoal bags that take a few minutes to assemble. Hope this helps.

medium size it's for 10 galons?

Hi Oscar, the medium size fits the Whisper PF10 and the Whisper 20 Power Filters.

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🐠 Keep your aquarium whisper-quiet and crystal clear—because your fish deserve the best!

EFFORTLESS MAINTENANCE - Color-coded cartridges make replacements quick and foolproof—no guesswork needed.
DUAL SIDED MESH DEFENSE - Dense mesh captures debris and fish waste, keeping your tank spotless.
MONTHLY REFRESH ROUTINE - Designed for easy monthly swaps to maintain optimal water quality and fish health.
CRYSTAL CLEAR WATER ALWAYS - Advanced carbon filtration eliminates odors and discoloration for pristine aquariums.
UNIVERSAL FIT FOR TETRA WHISPER - Specifically engineered to fit Tetra Whisper filters, ensuring seamless compatibility.

The Tetra Whisper Bio-Bag Filter Cartridges are medium-sized replacement carbon filters designed for freshwater and marine aquariums. Featuring dual-sided dense mesh, they effectively trap debris and fish waste while removing odors and discoloration. Color-coded for easy identification, these cartridges fit Tetra Whisper water filters and are simple to assemble and replace, recommended for monthly changes to maintain optimal water clarity and fish health.

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