Prostar 90 Lots of bubbles in filter roller

[Blackweb]

Hey. So im getting a prostar 90 cycled. This is one of the first tanks ive had that has an overflow and sump. Also the first tank ive had with a fleece roller haha. Ive had other tanks but all small stuff under 30 gallons. I have the clarisea 3000 roller and it works great but ive notice an abundance of bubbles coming from the overflow into the filter roller. Its practically a skimmer lol. Like i said, first roller ive had so im unsure if this is "normal". Im not sure if its related to the height i have the roller at as well. Ill attach photos of the roller, plumbing and overflow. Any help would be appreciated.

 

[Reefing Madness]

 

[rc8t6353]

I don't have any experience with rollers as of yet. I apologize if this is off subject, but can you fill me in on what you used to replumb your sump. I have a bigger sump ready to be installed but the metric plumbing that comes with the tank is holding me back

 

[dangles]

If you’re getting bubbles into the roller it’s probably coming down your overflow. Are you sure you have full siphon?

 

[Blackweb]

I don't have any experience with rollers as of yet. I apologize if this is off subject, but can you fill me in on what you used to replumb your sump. I have a bigger sump ready to be installed but the metric plumbing that comes with the tank is holding me back

To be honest its hard telling. I bought it second hand and most of the plumbing was basically done. And some of the parts they used to go from the metric to the 1 inch, im not really even sure what the parts are or where they acquired them (part with the blue ring).