Originally Posted by Samw

I think Co-current is the grandfather of skimmer designs. Water and bubbles enter at the bottom of the tube. Counter-current would be having the water enter at the top of the tube and exit at the bottom so that bubbles have a harder time rising to the top and will stay in the chamber longer. Co-current therefore is less efficient I think.

Originally Posted by StirCrazy

ok may be semantics but Co-current doesn't mean counter current, when you have a Co-something it means together so two currents together in the same direction. so I thought it was a different one I didn't know about.


Steve

Originally Posted by Samw

Hi Steve. I'm missing your point. No one said Co-Current is the same as Counter current. Co-current is something like the Sander Piccolo or the Coralife airstone skimmer. Counter Current is something like Lee's airstone Protein Skimmer.