I’m currently cycling my Innovative Marine 75 INT tank with RFS 27 sump. The water that comes down into the sump currently drains through a filter sponge, and then three different 4” filter socks - then it goes towards the space where a protein skimmer goes and then the return pump / ATO chamber.
My question is regarding the three different 4” filter socks slots. I am thinking the first slot I can place a Red Sea NanoMat fleece roller. Then the second slot I can place a filter sock, and then the third slot place a media bag with some type of bio filter (bio balls / cubes).
Is this appropriate? I’ve been out of the hobby for over a decade and jumping back in.

My question is regarding the three different 4” filter socks slots. I am thinking the first slot I can place a Red Sea NanoMat fleece roller. Then the second slot I can place a filter sock, and then the third slot place a media bag with some type of bio filter (bio balls / cubes).
Is this appropriate? I’ve been out of the hobby for over a decade and jumping back in.

