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For a fuge, I would go with Mainly live rock and Chaetomorpha. If you are willin to give up about 6" of height in your fuge, do a deep sand bed with aragonite sand.
I disagree on a deep sand bed. It will make detritus clean up more difficult and give critters more places to hide. I go bare bottom with cheato and other macro algae and as much lr you can fit.