it was build out of the spec from AM, however the famouse Sanders skimmer has about the same spec (only thy have a mazzie ventury that alows them to draw air)
http://www.aqua-medic.com/products/d...y_twn_sngl.pdf
http://www.aqua-medic.com/products/d...y_twn_sngl.pdf
what I found was that with the introduction of some more air, it foams better.
the skimmer neck I first had was 3 1/2 inch however changed it into a 5 inch and a world of diferance.
overall great skimmer, thinking of building a new one, based on the AM TF 10.000 Sander helgoland 500
not that the one is not preforming, more tho se is I can build it (winter time is coming so, would be a nice project