Another question about an overflow

I got an overflow but one dumb question . How do I get the siphon started? This is the style of overflow i got. Please help.


http://cgi.ebay.com/Acrylic-Overflo...ryZ46310QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

That's a weir overflow. Once you get it set to the correct depth, the siphone should start all on it's own.

 

Does it have a hole at the top for and air lifter pump?

I usually fill the front and back sections to the baffles with water, and I have an aqualifter pump hooked up to that little hole on top. It draws the air out. The other end is hanging in the tank to put any water it sucks out back into the tank. Alternately, you could hook up a venturi style powerhead in the tank attaching the venturi air line to the hole on top of the overflow. Once it is set, it should restart after power failures and such with no trouble at all ;D

 

I bought that same overflow. On the top is a small white nib. put a piece of airline tubing on the nib and connect the other end to either, as BirdLady suggests, an aqualifter pump (about $10.00 from many places), or as I did put the other end on the air venturi port on a powerhead. The first time, you will need to make sure that there is water in the middle chamber (the outside portion of the box, closest to the tank. When the inner box fills up, the air will be sucked through the tubing and start the weir. Don't worry about the bubbles coming out from your powerhead, they will stop as soon as all the air is evacuated from the Overflow.

Mike

Well, color me embaressed. I didn't read all of BL's post. I just duplicated all she said. (but she said it first ;D )