Bubbles rising ??

[gary.belcher]

Hi tank is about 3weeks old. Cycled with ATM Colony.

After the lights being on awhile I start getting bubbles all over just rising up. The longer the lights on the worse it gets. Iv added a video to hopefully help explain. All power heads turned off to make it easier to see.

Just wondering what it could be. Thanks

 

[MohrReefs]

Probably gas trapped in the rocks, should subside