Quote:
Originally Posted by untamed
That's right. The primary drain (with the gate valve on it) is just a bulkhead on the bottom of the overflow. The emergency drain has a standpipe.
When you first turn it on, water should fall right to the bottom of the overflow box and go out the primary drain. As you close off the valve, you'll hit a point where the water level in the overflow box starts to rise. You want to dial up the water level as high as possible, short of the emergency drain.
My overflow boxes are only 12" deep. I found that I need to keep the water at least 6+" deep to prevent air bubbles being drawn down into the primary when the water falls into the overflow.
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Ok that makes sense. So for water testing, I should start with the gate valve open completely and fire up the return pump and then start to close off the valve? Seems like a pretty good chance for a bit of an overflow until you get it dial in perfectly. How long did it take for you to set it? Would you also start by approximating how much flow you want to go to the refugium before you turn on the return pump? Does that make any sense? I guess I am trying to figure out how to get both herbies working together. Im guessing just a lot of adjusting until it works.
11-01-2007, 05:54 PM
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