I've got Chaeto in my primarily I also have some caulerpa (which I feed my tang), and some mystery red algae that is very pretty (don't really know what it is)... Also live sand is what is in mine (only snails, and one small hermit are all that is in there... (other than a ton of pods, and some bristle worms) it's 29 gals
That is correct, but it takes a lot of macro and reverse lighting to stabelize this, most of us are running much smaller refugiums than our display (me 180 display, 29 refugium) I can't stabelize my Ph with just reverse ligthing on my refuge... I also have to drip kalk at night and I still have a ~.18 Ph swing per day.
I can't comment on the dissolved oxygen other than by refering to my Ph swings as a reference.
Dave