I have been thinking of putting a 300 GPH CPR overflow on my 30 hex, into an old 8 gallon hex underneath my stand. (I know 8 gallons isn't a lot, but hear me out)

The idea, is to get everything together, and then drill the pack of the 8 and put a peltier chiller on it. I don't want to drill the 30 hex. The light canopy I am building is going to have a 175 watt metal halide on it, in an enclosed canopy with only a couple fans 'pushing and pulling' air through it for cooling, and as you might imagine, I am very concerned at what the metal halide will do for temperatures within the tank.

If the 8 is wide enough, I am going to stick a remora on it.

So the question is, it's about a 5 foot rise from the 8 to the top of the 30. Along the way, there will be a SCWD, and if I use PVC, a 90 degree knucle coming out of the 8, and four more going in. I think the SCWD is designed for 3/4 inch tubing. SO i figure with the 90 degree turns, I am looking at around 8 or 9 feet. (I think the rule of thumb is add a foot for every 90 degree turn?)

So with 8 or 9 feet of head pressure, plus the SCWD, and a CPR that conly take out 300 GPH, what pump do you think I should get? I was thinking one of the Magdrive series.

According to this chart http://www.marinedepot.com/aquarium_...me.asp?CartId=

I should be looking at a MagDrve 7 or 9.5, I think the seven will be slightly to weak, and the 9.5 a little too p owerful... :(

Still learning I guess! ;)