Fluval SPEC Biomax - 2.1 Ounces (3 Pack)

I needed this product to replace the one that I had in my fluval flex aquarium. It must work really well because I have had the aquarium for 6 years and have never changed the water! And the aquarium looks great, the fishies and shrimpies are happy, and so am I.

This Biomax media is the correct replacement for the Flex 32.5 according to the Fluval website, however the Flex 32.5 is not listed on the box as being compatible. I installed these a couple weeks ago and they seem to be working great so far. They are little different/smaller than the ones that came with the Flex 32.5 though.