Discussion in 'Resources' started by Jeff Rehling, May 18, 2018 at 5:36 AM.

  1. Jeff Rehling

    Jeff Rehling Guest

    My tank is full of them. I'm running a 75g with a four bay sump from EShopps. Dual overflow into filter sock into refug to skimmer/reactor chamber (with carbon in media bag) and then return pump. Bubbles are present in the refug but not the other chambers. I presume the overflow is very aggressive and causing them?

    How can I stop this??

    Thanks in advance
  2. Coral reefer

    Coral reefer President

    I would bet they come from the skimmer
  3. Jeff Rehling

    Jeff Rehling Guest

    I don't see any, but i guess i could shut it down for a few hours to rule it out? Would that be long enough? I did put it on the feed setting which is 10 minutes and didn't see any change. All the bubbles in the sump that are visible are in the refuge, which is before the skimmer.

  4. Coral reefer

    Coral reefer President

    Reduce flow from return pump or change the position of the the drain tube(s) so they don't make as much bubbles.
  5. Jeff Rehling

    Jeff Rehling Guest

    my drain tube is fixed...how would I move it? it can rotate slightly
  6. Flagg37

    Flagg37 Officer at large

    Do you have a valve on the drain?
  7. Jeff Rehling

    Jeff Rehling Guest

    not on the drain...
  8. Flagg37

    Flagg37 Officer at large

    Do you have just the single drain or an emergency one too? The end of the drain is submerged right?
  9. Jeff Rehling

    Jeff Rehling Guest

    my overflow drain has one pipe into a T and two into the sump, as my Eshopps sump has two overflow pipes entering the sump
  10. rygh

    rygh Supporting Member

    So do you see bubbles in the return pump area of your sump?
    It sounds like you do not, which means the bubbles in the DT might be caused by something else.

    Things to check:
    Are powerheads very close to the surface? You can get an occasional vortex sucking in air.
    Do you have an anti-siphon hole on your return? In the wrong place, that can act as a venturi.

    But also:
    Make sure drains from return line are below water level as they enter sump.
    Consider more baffles around return pumps.
    Make sure skimmer output is pointed away from overflow to return pump area.
  11. daddio

    daddio Supporting Member

    I had a lot of micro bubbles in my reef when I changed lighting due to photosynthesis. They went away after a short time. I could tell it was lighting because at the end of the light cycle there was more bubbles than at the beginning.
  12. Mozby's Reef

    Mozby's Reef Supporting Member

    Is the skimmer new? Once it breaks in, the microbubbles can go away. That happened for me.

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