Tetra Carbon Filters Whisper Cartridge Review

These carbon filters work amazingly well - they keep my aquarium water crystal clear and pristine. They're also incredibly easy to use and install. The only downside is that they need to be replaced every month or so which can add up in cost. Overall, a great investment in pet supplies for any fish or aquatic pet owner..

Would you like to know when these round bottoms will be available in stores? I like them better than the old square ones. But they're hard to find, so buy a newer rounded-bottom filter. But I have yet to order them from Amazon.