Refugium Depth
I am designing a refugium for my tank and would like some opinions on refugium depth for a deep sand bed with chaeto. I have quite a bit of vertical space available and have been using google sketchup (a bit slow since this is the first time I'm using it) to come up with my design.
The difficulty I am having is deciding how deep the water should be above the sand bed. With my current design (assuming a 4" sand bed), that depth would be 15-16" from water surface to sand! That seems crazy deep to me, but I have never had anything other than a wet/dry sump before now. Is there some kind of generally accepted/ideal depth? Perhaps I could shorten my design...
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