Quote:
Originally posted by Patrick12
Teeth all the way. They help in other ways too.....with the surface skimming.
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Actually the opposite is true. Teeth impede surface skimming.
Lets take a 20" long FLAT overflow... it has 20" of surface skimming area.
Now put 1/4" wide teeth with a 1/4" gap in that overflow. You now only have 10" of open space... or 10" of area available to surface skim. Given the same volume of flow from the return pump, the water will be twice as thick over the toothed overflow. That means less surface turnover, and less surface skimming for the same flow as compared to the toothless overflow
