Thanks for the info Stephane.
I am going to use the TetraTec DW96. It may not be enough, but its the biggest normal type airpump. Although the skimmer is a 6ft.-4in. I am using the top of an old 3in.cc from Rons Saltwater Heaven. {another good place to purchase a counter current if one does not wish to build. He will ship to Canada. The skimmer is just cut in half & put together with a coupling}.
I used the top because its well built. Only problem is the 1in. throat to the collection cup. However some say this works good with the above air pump and its only to assist the scrubber.
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Doug
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