Upgrading from a 70 gallon to 180. It's been a slow lengthy process which is fine with me. First I removed a built in stand that held an old TV and then held the 70 gallon and had a stand custom built. Acquired the sump from a fellow reefer. Replaced the skimmer in the pic with an Octopus 3000 INT. Auto top-off up and working. Figuring out the Apex system and still messing with the rock, but it's a good start.