I have a breeder net loaded with chaeto that is kind of hard to see in the picture. If i took it out of the net it would take up half of the refugium area. I plan on getting a HOB skimmer when I get the money since my fuge isnt big enough to drop a submersible in there. I guess I could add some carbon in there, right now all I have is a microfiber filter. So I should add a skimmer, carbon and more snails--is that the bottom line?