Closed Loop - 180g AGA Questions

[Bloke]

This is what I was thinking for a closed loop on a 180g AGA Reef Ready tank:
http://www.wichitaaquariumclub.com/photopost/data/518/medium/180CL.JPG

The four inner holes will all be return holes while the two outer/lower holes will be intake holes for the pump.

I do not want to come over the back as others have done. I was also planning on each hole being 1 3/4" (large enough for a 1" bulkhead).

This will be primarily a mixed reef, yet dominated by SPS. For this closed loop, I was thinking about running a Reeflo Dart pump (3600gph)

Let me know what you think on hole placement, number, size, etc.

Shane

[JRaquatics]

Good pump choice, but consider getting the Gold. I would put two returns on the outer upper corners and use flex line. This way those outputs would be positionable. I would also use the bottom center holes as the intakes. How do you plan on doing your rock work will help on the positioning also.

[Bloke]

Drilling the ends would not be a problem - that would add two more return lines. Also, I might use two different pumps - one for each side. Perhaps run two Reeflo Snappers (2500gph) instead.

What about this configuration? All bottom holes would be intakes while those at top are returns. Plus, add one return on each side panel:
http://www.wichitaaquariumclub.com/photopost/data/518/medium/180CL1.JPG

As far as aquascaping, I want to create LR towers using PVC so there should be plenty of room for fish and flow. The towers would look like this respectively:
http://www.wichitaaquariumclub.com/photopost/data/510/Image21.jpg

[tas5tas]

I have a 125gal and this is how I'm doing my closed loop with a Dart. http://reefcentral.com/gallery/data/500/156390125_Gallon_Closed_Loop_1.jpg

The 2 holes in the back center of the tank are the drains to the Dart and the other holes are the returns. I haven't decided if I'm going to use an OM 8 way or not, but everything is already drilled except for the sides.

[tas5tas]

free bump