lyotim88
Fishaholic
So i'm getting ready to make my final order to get my sw tank set up and i'm going to order some bioballs for my sump. Now they have ones filled with carbon(which i suspect i shouldnt need), ones filled with ceramic, and ones filled with foam. Oh and ofcourse regular solid ones. Which one do you think would be most useful? I was thinking the foam filled ones for more mechanical filtration. What do you guy think? Thanks