You got it H20ENG, its pretty much a venturi for the intake. For the 18"x18"x72" tall monster, I prolly will use 3/4" if it ends up that tall. The original plan was a 6xbeckett skimmer with a 12x12x72 main body...but with this dart...maybe 18" is better? Who knows. The whole thing is on hold for now until I know what the pump will be.
There is actually a use for this skimmer as well...a 1500g reef that a friend is making. He said that if I make it for less yet better than the BK he was looking at, he will split the difference with me... and its kind of fun.
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