I have a 30L that I'll be using for a sump. I'll probably wait until I have a skimmer before adding all of the baffles, but am wondering more or less what size is needed for the skimmer - I'm leaning towards either an ASM G3 w/ gate valve mod or a AquaC EV-120. I think the ASM has a bigger footprint. Will probably be set up skimmer>refugium>return or if I don't have a refugium, then line in>skimmer>return. Any ideas appreciated!