Sump is an 18g rubbermade container. Overall height of 17", waterheight of 10". Contains rockrubble (15 pounds), protein skimmer, and return pump. A no light section helps to stabalize temp during summer months.
Protein skimmer: Vertex IN100. Probably too small but with truf scrubber, refuge, trickle filter, and all the live rock I feel comfortable with it. I do not believe in overskimming. Collect a large cupfull every 4 days or so and clean extensively.
No auto top off. Manually add 2g perday.