Aqua Tech HEX 5 #5 EZ Change Aquarium Replacement Filter Cartridge 3-pack

It works like it should. When it comes to filters, that's what it should be. The only real con is that they are more expensive than other filters.

Easy to use and keeps my aquarium for my betta fish nice and clean. All I have to do is monitor how dirty it get and pop another fresh filter.

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