Tangboy,
That is a very nice setup you have there. Simple and pleasant.
lilmarkho,
A sump can also add to the total water volume. Tank makers are notoriously generous with their tank ratings. I have a 215 that probably holds 190 gallons. When you add rock and sand, water volume is decreased even further. A sump allows you to make up some of that lost volume. Adding LR to a sump allows you to increase the total surface area for bio-filtration. My sump has about 30 lbs of nano rock (rather than bio-balls) to support this filtration.
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Republicans - \ri-ˈpə-bli-kənz\ noun: America's other left wing.
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