Aquaclear intake tube "bubble"

[andyjh]

I'm running an Aquaclear 70 and though it self-primes reasonably well there is a "air bubble" at the top of the intake tube. (just at the bend before it enters the filter box). Everything is seated properly. Anyone else have this? Flow doesn't seem to be affected.
TIA
Andy

 

[geekboy]

Mine also has this, to no ill effect. Same filter.

 

[Star_Rider]

same here with all of mine

 

[andyjh]

I only questioned it because when I looked at my Aquaclear 50 on another tank there is no air bubble at all.

 

[stumble]

bubble

my old filter gets bubbles in it and will make noise I just push on the tube to make a better seal and the bubble gets sucked out

 

[SubRosa]

Possibly the filter isn't level in the front to rear orientation. Try pulling the top of the filter towards the front of the tank and hold it there a few seconds.

 

[jpappy789]

All mine have that.

 

[Hebily]

Is it at full flow, or throttled? If it's throttled, try taking it to full flow for a couple hours, and see if it goes away. Then you should be able to go back to the throttled position without any problems.

 

[fishorama]

3 of mine have a bubble, 1 doesn't

 

[andyjs]

I only have my AC110 running right now, but it normally sucks all the air out when I start it up. If I don't let it run full out for a couple minutes before turning the flow down, it might keep a bubble in there sometimes though