air bubbles

[pounder]

I am in the process of setting up my 120 gallon tank. I have a All Glass with corner overflows going into a Ecosystem. I the water is driven by a 1200gph pump plumbed outside the sump. My problem during testing is micro bubbles clouding the water. I know some bubbles are good but this seems to be too much. Salt has been added specific gravity 1.020. No livestock yet. :?: Could it be coming from the anti siphon holes drilled in the output spout? Or am I sucking air from the pluming?

 

[Anonymous]

you may also be getting cavitation from the pump's impeller chamber itself- try throttling it down abit (from the output only) and see if this helps.

 

[danmhippo]

micro bubble is not a good thing to have in a reef setup. You will have to track it down joint by joint. The anti-siphone hole look quite suspicious though. If I were you, I would seal up all plumbing joints to try to pinpoint where the air is being sucked in. It's a tedious task, I know, and I've been there.

Is the return pump totally below sump water level?