Micro-bubble help

[adoucette]

So I am getting a lot of micro-bubbles coming out of my returns and I can't figure out why. I have a 180g tank with a 40g breader for a sump. My return pump is external and the last chamber where it draws the water from is totally clear of micro-bubbles. I can't figure out where air is getting into the return lines? Has anyone else had this problem? If so what caused it and what can I check to fix it? Any suggestions would be a great help.

 

[CRW Reef]

I have the same problem and I am convinced its my loc line sucking air somewhere on the way out. Are you hard piped or flex piped?

 

[adoucette]

Hard piped. I just replaced all the plumbing...

 

[Off The Deep End]

I would agree with the locline, i have seen it most of the time its at the union where the locline is attached. Also check the connection from sump to pump. HTH

 

[Cake_Boss]

I had the same issues, make sure your fittings aren't leaking and don't bend your loc-line so much, otherwise you'll have to silicone the joints like I did

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