External inline CO2 diffuser......which one ?!?!?

If you put the inline diffuser as far as you can from where the return enters your tank, would that make it a lot better I wonder....I am just afraid it would look all "misty" but maybe it's worth it.
 
Well went ahead and bought one of the atomizers. Got it for 23.99 free shipping and its a seller in New York, not China. Pretty excited to get that bulky power head out of my tank.
 
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