Surge device, closed loop or bigger powerheads????????

[Rikko]

There it is...
http://www.reefcentral.com/forums/sh...hreadid=507732

I actually have an exit hole on mine and can't really tell if it works anymore. When I used the same hole on a Carlson surge (same connections to the surge atop), the hole actually worked as a Venturi and gave a 100% bubbling surge. With the Borneman, it shoots water out. Go figure?