ReefMat 500 bubbles at intake?

[Doglips56]

Please see short videos. Lots of bubble coming into RM 500. Is this normal? I have a 115 total volume system. Pump is Jebao 15000 PO31/FO31 is what it’s set at which is close to the lowest flow rate but can be turned down to PO/FO 26 at lowest rate

These video links are same as the attachments but I know sometimes they can’t be viewed.
Ideas? Thoughts? This is a brand new system but really not new new because it was an upgrade and moved everything from my old tank into this one but the ReefMat is new and the plumbing is all new so no slime in it yet. No bubbles after the filter section.
https://youtube.com/shorts/9bfXY9UjQQw?feature=sharehttps://youtube.com/shorts/rvdd3nRfoHc?feature=share

 

[Lbrdsoxfan]

Do you have a gate valve on the drain? Needs to be adjusted if you do, too much air in the drain

If your getting bubbles to the display, try a sponge where the egg crate is, doesn't look like there is one there.

 

[Doglips56]

Do you have a gate valve on the drain? Needs to be adjusted if you do, too much air in the drain

If your getting bubbles to the display, try a sponge where the egg crate is, doesn't look like there is one there.

I do have a doing in the bubble trap between the two baffles just before the return pump, and am not getting any bubbles in display, probably couldn’t see it in the video. I do have gate valves on both the return and the main drain but seems as though no amount of adjusting either way is helping. This tank came with a bean animal setup and I read in another thread that their secondary drain was sucking in air. Could that be the issue?

 

[Lbrdsoxfan]

Well, if you have the primary and secondary drain plumbed to the reefmat, that's probably your issue. I'd just only plumb the primary drain to it.