Reef octo hob classic 90 bubbles

[Jekyl]

Had my tank running for around 3 months and just installed a skimmer. Everything seems to be installed correctly but lots of micro bubbles are making it back into the tank. Is this normal for break in? I feel like it needs to be half an inch further into the tank but due to my rim and design I cant do it. Any thoughts are appreciated

 

[Hitman]

It’s normal. My RO 90 did that for about a week. Just leave the tube set to open and let it run, once the oils wash off and a bio film develops it will slowly stop.

 

[Jekyl]

I figured it out. I ran some meds last week and they were causing crazy foam. I added some carbon and now its good.