Originally Posted by mattcham
Which one is the best?
Which one has the greatest surface area?
Which ones get clogged and lose effectiveness the earliest?
Which ones can be disinfected (in case of disease outbreak)?
I'm surprised that there are no head to head tests. Should be easy to test in a controlled environment using liquid ammonia.
If I'm not mistaken aquaclear biomax and fluval biomax are the same thing. Both own by Hagen inc. Nevertheless, I've used both biomax before, never had any issue with them. Though compared to Eheim substrat pro, it seems to deteriorate faster. I believe eheim substrat pro has the most surface area.
Sorry, I haven't had any experience with the other bio media, you have listed.