[trreherd]

Do you want to drill your tank or do you want to hang it over the walls? Do you want to use a squid? How much flow you looking to generate? Closed loops are pretty simple i dont know y you want plans.

 

[trreherd]

Well a squid is a 'T'that the output of the pump goes into, the output is than split in two pipes and the flow is 'pulsed' between the two tubes.(alternating flows are good for coral)
http://www.marinedepot.com/md_viewItem.asp?idproduct=3Q1111
Here is a strainer to stop the fish from being sucked in.
http://www.marinedepot.com/md_viewItem.asp?idproduct=FT8544
And for a high flow rate like yours i would use a mag pump(very popular pumps, but mikes always dissin them) This is a 950gph pump
http://www.marinedepot.com/md_viewItem.asp?idproduct=DN1127
closed loop idea
http://www.melevsreef.com/closedloop.html