I'm in the process of adding a refugium to my sump and I have allocated a 12x12x12 space for it. I have been reading on the internet about how they set up their fuge and the advantages each of the different types of macro-algae and substrate offer. So my question to the MAASTateers is what type of macro-algae do yall use and do yall use a DSB, mud, or bare bottom? Thanks for input.