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					Originally Posted by  Dale
					 
				 
				Hi rocketlily, 
 
Three concerns that come to mind regarding refugiums are:  
 
Designing too small a space to be effective for nutrient reduction 
Low flow designs that become problematic nutrient sinks 
Using Macro alga's that don't fit the design 
 
When designing a fuge I think it's important to be quite specific about the function you want it to serve and the type of macro algae you might stock. The more specific at the design stage, the better the end result. A refugium can: 
 
be used for nutrient conversion/export 
be a breeding place for micro organisms 
be a quiet place for delicate fish or corals 
be stocked with macro algae, live rock, sandbeds or mud beds. 
 
Any thoughts on your proposed application? 
			
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 I am not sure what I'lll be doing in the fuge at this time, but I want a design that will not limit me in the future.