280g At the Office

[PFisher]

We are doing a bunch of renovations at work and have decided to put in a 280gal reef tank. Since I have been running a 30g at home for several years they are looking to me for advice, but there is a big difference between a 30 and a 280. I have been looking through the forum and have gleaned many ideas, but still have a few questions.

My main question is about the water changes, a 10% change on my 30 is simple enough with a few buckets but I don't want to be mixing 30 gallons of water at the office in buckets. Does anyone have a setup where a water change is a matter of turning a couple of valves? We are changing everything so things like plumbing in a drain and water for an RO unit are easy options.

My second question is on the refugium volume. How big does it need to be for a 280?

Once we get to the install stage I will be sure to post several pictures.

Thanks in advance.
Patrick