I'm about to buy a couple of WVO filters from eBay, but there seem to be 2 types.  One type has a clear bowl, the other a blueish bowl, do I need the blueish one or is the clear one OK?
 
Also, should I filter in 3 stages (10, 5 & 1) or just 2?
					Also, should I filter in 3 stages (10, 5 & 1) or just 2?

							
						


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