How to remove particles in LARGE tank?

[((FORDTECH))]

Its funny you bring up what you are using, as I in the process of typing why I was asking that question, as I also use BRS 2-part for both.

The only time I have seen such particles in my water column is when I clean, or disrupt the settled debris in my sump.

Same only time I see this is when I turn off my supply pump and then turn it back on

 

[Dolphins18]

Any chance you noticed those bubbles showing up in your tank shortly after removing your UV?