I'm planning on drilling a 36Gal Marineland and installing a Synergy Reef Shadow overflow plumbed down to a Synergy Reef CL-44 Sump. Can a sump ever be too big? I was planning on using it as a refugium only in the beginning. My thoughts on going big on sump and other areas is one day i may be able to carve out a little more space in the house for a larger tank.