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					Originally Posted by  Hydrologist
					 
				 
				I also run a cryptic zone vs. refugium.  
 
Very high flow rate running through my sump.  It consists of some live rock rubble suspended with some eggcrate. 
			
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 I imagine that under the flow under eggcrate would be alot slower flow rate and top would have higher flow?
Is it loaded with sponge and fan worms