NEED HELP STAT!

A good friend recently bought a house that has a pretty sweet Reef setup, including a refugium.

The big issue is the owner completely neglected the tank for almost 2 years.

No skimmer, lights, water changes (just top off).

There still a few fish in there...but I see no coral growth but over all the equipment looks functional.

The tank & refugium TTL size is about 300 gal.

Long story short, what should I do to get this tank up and ...