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Locating the source of micro bubbles...

Dom

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So I have a tank which is filled with micro bubbles.

I turned off and removed the protein skimmer from the sump, but still get micro bubbles.

Is it possible that one of the joints on the return plumbing is leaking and drawing up air as the water passes by the joint on its way back to the tank?

If not, what might be the cause?

Thank you,
Dom
 

Peace River

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Yes, if it's not the skimmer then another likely place to look is for pinhole leaks in the return plumbing. Also make sure that there is no whirlpool above the return pump because the pump is too close to the surface. Same thing with the powerheads. Good luck tracking it down!
 

BlennyTime

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It could also be that the flow from your return is too high. If you have an adjustable pump, could try turning it down and see if that helps.
 
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Dom

Dom

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Yes, if it's not the skimmer then another likely place to look is for pinhole leaks in the return plumbing. Also make sure that there is no whirlpool above the return pump because the pump is too close to the surface. Same thing with the powerheads. Good luck tracking it down!
I have a pair of eFlux pumps that are about 6 inches below the water line. No whirlpool . And I have seen that when I had them closer to the surface.

Its pretty much a straight run from the pump to the return. But I will reseal and reassemble the plumbing in hope of eliminating the issue.

The pump on this tank is a Danger Mag 5. Bullet-proof pump. It was my first pump when I got in to the hobby (15 years). It has become a bit loud, probably due to a worn impeller. I have a new impeller in my inventory. I thought this may be the problem, but it is below the water line, so, I am at a loss to see how this could be the problem.
 

Pistondog

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So I have a tank which is filled with micro bubbles.

I turned off and removed the protein skimmer from the sump, but still get micro bubbles.

Is it possible that one of the joints on the return plumbing is leaking and drawing up air as the water passes by the joint on its way back to the tank?

If not, what might be the cause?

Thank you,
Dom
Wouldn't water leak out rather than air going in, since the water is at a positive pressure?
Holes can cause air leaks on the suction side of pumps in pools systems for example, where pumps are not always under water.
 
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Dom

Dom

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Wouldn't water leak out rather than air going in, since the water is at a positive pressure?
Holes can cause air leaks on the suction side of pumps in pools systems for example, where pumps are not always under water.
Thought the same. Tried changing the impeller but no improvement.
 

un5tab1e

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Is your water falling over a baffle into the return pump section? What powerheads in the tank and are they pulling air from the surface through a whirlpool? Also if you are using a random flow generator like the vca one on your return line they will draw air if too close to the surface.
 
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EW_Fish

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Only thing I can think of is the return pump getting air for just a second you wont see this unless you sit there and watch it. Next is the return nozzles close to the surface this also will be very random neither of these need to male a lot of bubbles because your pumps will multiply them in the tank.
 

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