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					Originally Posted by  diana
					 
				 
				really depends on your setup. For the reef i would tend to lean towards not using them b/c they are good at trapping debris and thus causing nitrates. Although if you keep them really clean then i can't see a reason not to. Imo if you have enough healthy live rock you really don't need them.    
			
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 +1
The offshoot of this is that if you DO use bioballs and are very good at cleaning them, you can actually really reduce potential nitrates, almost like a human powered skimmer.