Sump: over/under/over? or the other way?

[MikeInToronto]

Thanks for the replies.

I won't be using a refugium. This tank is small so I'm not getting too deep into the build until I get a larger tank. This one is just for practice. I've been out of the hobby too long so I'm trying to relearn what I've lost (or what's changed).

I'll go with over/under/over which was my original plan. I stopped after attaching the second baffle because I starting doubting myself.

Originally I only installed one baffle and had the sump running but on a whim this morning before work I emptied the sump and cleaned it for the extra baffles I had cut but never used. One baffle was fine but there were some bubbles getting in the tank and now I want them gone. I also want to stop using filter socks and sponges.