Here is a posting from socalireefs.com :
Instead we are using Live rock to get more Bacteria in the sump, we are currently running Bacteria House the best Japanese Filter Media in our sump. They produce a ton of bacterias in the sump to support your main tank and your frag tank. it has lot of opening little holes from bacteria to grow.
They say you can eliminate using chetto.
https://s265.photobucket.com/user/Ranger69/media/BioMedia_zpscdb3f100.jpg.html
https://s265.photobucket.com/user/Ranger69/media/BioMedia1_zps3623158d.jpg.html
Instead we are using Live rock to get more Bacteria in the sump, we are currently running Bacteria House the best Japanese Filter Media in our sump. They produce a ton of bacterias in the sump to support your main tank and your frag tank. it has lot of opening little holes from bacteria to grow.
They say you can eliminate using chetto.
https://s265.photobucket.com/user/Ranger69/media/BioMedia_zpscdb3f100.jpg.html
https://s265.photobucket.com/user/Ranger69/media/BioMedia1_zps3623158d.jpg.html