closed loop bubbles.

otolith

Cancer Sucks
Premium Member
I would bet there is a leak on the pre-pump side that is creating a venturi and the bubbles. Take a peak at the connection into the pump and from the tank and see if it takes care of it. :)
 

ulua56

New member
What kindof pump do you have ?Pump could be cavitating, reduce output, see if that helps
 

salineh2o

Premium Member
It's a dolphin 1200. and there is no adjustment for flow.

I may have to add a valve after the head.
 
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