fishfreek and melonie, I really appreciate all of your concern, but have already done my homework on the pumping subject. I have a 29 gallon tank and am shooting for a turnover of 7 to 10 per hour (at least 200 gph
). Measuring from the estimated water surface level of the sump to the surface level of the main tank, I will have a head of 2.5 to 3 feet. (I know most people measure from the bottom of the sump, but this is one of those common misconceptions that errors on the side of safety).
Oh, and anyway, I just ordered a Mag Drive 3 (300gph at 3ft) for $22.50 at petsmart. It's backordered and the price is too good to be true, so I'm keeping all my fingers crossed.