Red Sea Reefer 450
 

I would like to add a refugium to my Reefer 450 sump. Does anyone have experience with this tank and ideas?

Sorry no personal experience with this tank setup, on the wishlist...
Are you wanting to put Chaeto in your stock sump? If so I see no reason why you couldn't throw a ball of it in the main skimmer section. It looks like basically the same layout as an Aqueon Pro Flex sump I used to have. Only issue I found was skimmers and Chaeto don't mix well, so had to create a funnel over the skimmer intake and use "wedding veil" to keep the small pieces out of the needle wheel. I can post a pic later if you want. Also had miracle mud in the same section.