UHGGG getting sick of micro bubbles!!!!

scootyman

New member
So this is my first post along with my first saltwater reef ready tank with a sump (not my first SW tank). So the tank has been up for roughly 4 months now and i still have a TON of micro bubbles from my oulet side. We had a 29 gallon before this 90 that we used as the sump. plumbing ont he sump is all hard piped using pvc, 1 1/4 on the drain side and 3/4 on the return. return pump is a mag 9.5 (got the pump used). Heres the issue, i have a bubble trap, zero bubbles are getting into the return section of the sump. a little about how the sump is set up. the tank drains into the left side, in that chamber is also the protien skimmer, from there it goes through a bubble trap and into the return section. water gets pumped out to a y fitting and one side goes to a refugium in the right side of the sump and drains back into the middle return section. The other section of the y goes back to the DT. I have ball valves to control the flow through the refugium and also to the DT. If i have the ball valve open more than halfway to the DT i get SO many bubbles its unbearable. The more flow, the more bubbles, the less flow the less bubbles. No water leaks at all in the return side of the pvc. Like i said this tank has been up for 4 months now so i would have seen leaks by now. I have tried everything from runnign a filter sock, to putting foam in the bubble trap to shutting off the flow to the refugium, turning off the skimmer, nothing seems to make it change, could there really be air getting in the return side???? Is my mag 9.5 bad??? I just dont get where these fregin bubbles are comming from. Please help, i will try anything.
 
Maybe a leak in your return plumb or your pump cavitating?

I have had both give me micro bubbles in the past. Is the mag exteranl?....if so what is the inlet size?

A pinhole anywhere in the return line can introduce bubbles.
 
The pump is submurged in the return section. If i had a pin hole somewhere or even a little leak wouldnt i at least get a drip or no?? I really keep a close eye on the plumbing. LOL twin aqua clear 110's here i come, lolol!! Anyway to find a air leak in the pvc??
 
Shine a very bright spotlight into the return section and look very closely for microbubbles.
 
ok, so the flashlight trick revealed some bubbles, next step would be to try to get rid of those bubbles. what are my options???
 
Pics of the sump would help. Hate to say it but I've seen this a million times. Too big a return pump and a bad sump design. Non functional bubble trap with the spacing too close to do anything is the typical cause of this.

If you use a very bright light light an outdoor floodlight you would be able to see even more on what is going on. A sump redesign may be in order, but some pics of the sump first would help.
 
will grab some pics. i used 2 dvd cases to space the bubble trap panels sides and bottom. Let me go grab the camera and ill post some up. Also mag 9.5 to big ya think?? even so though why would to big of a pump cause bubbles??? Im just trying to fully understand.
 
best i could do for now:

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And my favorite guy, my pink spotted watchman named walt:

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sorry for the mess under the stand, lots of stuff moving around under there. filter sock is temporary was just trying to remove more bubbles, but its not working.
 
Nice job putting that together. Use that fuge light ti look into the return section. Its a little hard to see what is going on in the pics. The bubble trap is an O-U-O or just O-U?
 
I have been going through the same thing, with no luck the I figured out the problem was to much flow through my sump,the flow was enough to suck the bubbles through the bubble trap,when I reduced the flow no more bubbles in the DT
 
wow those pics look horrible, soory its a 100 dollar sony camera, lol. It really honestly doesnt look that bad ill get the better one out tomorrow and take some full tank picks. Also have an underwater camera im gonna start playing with.
 
Oh please. Typically people will post horrible phone camera pics that you cant barely even tell what the pic is. Yours are far better than most.

O-U is very bad. The bubbles ride through the narrow channel and are delivered right to the intake of the pump from the low opening. You would be better off with just an "O" to keep the bubbles on the surface. As a test try to block off the bottom of the U and make the water go over both baffles.
 
ok, ill test that tomorrow and report back, right now im heading to bed, the morning comes early!! so if i added another over it would prob solve most of it i bet huh??? also if i had to add another panel and had to take the sump out, would my tank be ok for 24 hours without any kind of filtration for that period??? just a power head??? thanks for all the help so far!!

Rob
 
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