For those of you that have more than one tank, how much effort do you put into avoiding cross contamination? Do you have separate tools and equipment for each tank or do you just treat them like they are one system? What about if you move coral from one tank to another, do you dip them? Do you QT fish before moving them? I was feeding frozen mysis tonight and thawed it out with water from one tank but poured it into both of my tanks. Just curious what most people do.