FreshyFresh Global Moderator Staff member Jan 11, 2013 5,079 851 144 West Falls NY Real Name Joel Sep 27, 2014 #11 I made the carbon removal suggestion because you need to remove the carbon bag to make room for the additional sponge. If you tried to stack sponge, sponge, carbon, and then bio bag, your bio media would be up out of the water flow.
I made the carbon removal suggestion because you need to remove the carbon bag to make room for the additional sponge. If you tried to stack sponge, sponge, carbon, and then bio bag, your bio media would be up out of the water flow.