Yes, It's a mag 5. I have it turned down a bit though cuz my overflow can only handle around 350 gph. The baffles are made of some leftover 1/4" acrylic i had laying around. I put them in myself. You can see that because of the limited space I had, only one side of each baffle has silicone. I don't think it's an issue though since there isn't much pressure on them. If you ever need any help "designing" a sump let me know.
Thanks for the kind words about the rock lay-out.