Cleaning sump

[Rmckoy]

I am thinking cleaning out the refugium section of my sump .
The cheato is on the top
In the bottom I have a few pieces of live rock which have the soft brown tube feather dusters intertwined and growing everywhere .

Can I remove everything , rinse in tank water without disturbing balance ?

 

[JGT]

Yes, might want to siphon out some of the detritus on the bottom as well.