Sure thing Dave.
There are a few things we've tried over the years.
You'll want something with a decent light, so you can have less brown-out.
Small is good, since you'll be doing water changes, and the dosing will be expensive if you have too much water volume.
Prazipro is highly effective against flatworms, and other such critters, and you can run interceptor for the redbugs.
We haven't found a systemic treatment for the bad nudibranchs, you need to dip for those, and then keep in your QT for monitoring.
At least 2 weeks for observation and for the dips and systemic treatments to be effective.
A big adjustment for us was a psychological thing - you have to accept that if the coral dies in QT, it's better than risking a system epidemic. This is VERY hard for expensive, sensitive corals that you'd be tempted to just throw into the display. Believe me, we have had plenty of corals die during the dips and QT regimen. But happily, no big problems in the display as a result.