NEReef

So i have a question does anyone run multiple tanks on the same level as a sump? I know people have separate refugiums but I want some feedback about how the whole daisy chaining multiple tanks together actually works. Are there more problems with water levels due to different tanks or does it all just level out? Do bulkheads between the tanks distribute the water evenly etc??? Those types of questions are what I'm working through because right now to keep the equipment under the tank I basically ...