Changing Original Rea Sea Reefer Sump Out

[Kehaulani]

Has anyone every swapped out the Red Sea Reefer Sump for another brand?

I have a Rea Sea Reefer 350. It's a 73 gal display tank with a 18 gal sump. I'd like to have a sump that holds more water volume but I'm not sure what sump (if any) will be a good fit for this system. Any advice or recommendations are appreciated.

 

[blaxsun]

Anything you can fit in the space, really. Preferably where the chambers match up to the plumbing (otherwise you'll have to modify that).