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Prezioso,
I am curoius how people answer your question. I am not expert, but I would guess that a deep sand bed would provide you an anoxic area for denitrification and therefore would be good even without light. Not to mention cops and stuff may thrive there. I guess it depends on what you want your refug to accomplish.
Everyone, If I hang poly pads in my sump for a pod condo would the pods need lights to thrive or can I keep them in the dark?
Thanks,
Chris
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