BET Method surface area analysis has determined the effective surface area of OF 3DM Pro-Filter Medium to be in the range of 2550mē / litre, far surpassing other biological mediums in the market.

As taken from their site,
https://www.yihufish.com/products/fi...filter-medium/
Way more than reputable brands such as Seachem. Mailed QianHu to provide independent source analysis but haha no reply.From what I know they're good at copying and their products have a good price only...not exactly quality.

  • Seachem matrix is highly porous - enormous surface area (>~700 m2/L)
  • Anyone got thoughts on this compared to other filter media?