I've seen a few of your frag tank pics and no one seems to have sand at the bottom. Why/why not? I'm about to start my first frag tank and I'm not sure if I should add some sand in the base.
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Not sure if it may help with pod population or anything like that...
i dont' have sand in my frag tank and i have pods all over the place, they cover the glass. not enough predators.
I like to have no sand in my frag tanks as well. But also make sure you have enough live rock/sand in your sump to ensure you have enough filtration. I think that was the problem in my last frag tank, not enough filtration and I was always dealing with algae even though I skimmed like crazy.

