Microbubble expert advice needed

goldenboy

New member
Let me just say that normally I work things out for myself. However, in this instance I've tried everything I can think of and nothing's worked, so I figured I'd ask and see what others may know.

I have a 90-gallon Marineland corner-overflow tank that flows into a 30-gallon sump underneath. I had an LFS make the sump for me and it has a refug on one side, a center section with a sponge and bio balls, and another section that houses my Reef Octopus NW-150 skimmer and Eheim 1262 return pump (which is controlled w/ a ball valve). The overflow is split with about 50 or so percent of the water (through mesh filter sock) going into the refugium and the other 50 percent (through mesh filter sock) drops into the section with the bio balls that eventually empties through an inch clearance at the bottom into the skimmer/return chamber. I know its not the best set up due to the skimmer and return pump in the same chamber--not sure why it was built that way. I guess they never had this issue.

The tank has been running for a little over two months and I still get microbubbles in the display. When I hooked the Eheim up earlier this week, I replumbed everything from the pump up to where it connects to the bottom of the tank and eventually out the loc-lines.

I've even put a felt filter sock over the skimmer output in the event that's where the microbubbles were coming from. It didn't seem to work.

I'm at a loss and was hoping someone had suggestions. I could probably live with it, but now its at that point where I have to figure this out.

thanks in advance.
 
Micro bubbles can be tricky felt socks should really help ive fought bubbles for awhile part of my problem is to much flow through my sump it doesnt give time for bubbles to surface in your problem its probably pump is to close to skimmer or drains dnt know could be a pump cavitation prob to have you tore your pump apart and looked for blockage pics would help also turn your lights off use a flash light and look to see where the bubbles are coming from in the sump you might be able to pinpoint the prob also on the return hose or pipe a slight pin hole crack or anything can suck air in as it flows past like a venturi so check your connections thats all i can think of good luck also is i posibble to take out bio balls not great if this is a reef and put return in their or maybe drill a hole and do a external pump somewhere else just a thought
 
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