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It's a year old and I bought it 6 weeks ago. I was just worried that the bio media has been in there to long and is not doing anything
Many thanks
Biomax is just surface area for beneficial bacteria. It doesn't "go bad". It doesn't have as much surface area as some of the newer ones, some of which are mentioned above. I like Brightwell's version because it is also impregnated with something like what a sulfur denitrator uses to lower nitrates. I agree though that for now I would practice good husbandry and monitor your readings to see if they will come down on their own.


