Help With Building A Sump.

[RRaquariums]

So I have a new 125 gallon tank that I will be making into a reef tank and I need help designing a custom sump for it.
I have an old rimless 75 gallon glass tank I want to turn into a sump which means I need to reseal it and get it moved into a space I can work on it.
I'd like any suggestions or maybe pictures of any sumps you guys have designed or built I'm still trying to figure out just what I want but any ideas are welcome thanks

 

[DrRob]

A lot of it will depend on what you want the sump to do.
 
Is it going to function as a filter or will you, as I expect, be using live rock?
 
Do you want an area for nutrient export/mud/dsb's?
 
Do you want to hide kit like heaters and skimmers?
 
Do you want a section as a refugium for fragile stock or frags?
 
One thing I will recommend for a marine tank is the u shaped baffle section that stops microbubbles from getting back into the display from the sump.