"Crud" in the pipes !!!

Anyone have any tricks up there sleeve to avoid all that waste that builds
up in the line of the sump return or
in my case the sump return and Closed Loop circulation system. Either a way
to clean it or stop it from polluting the tank.

Every now and then if I shut one of the pumps off and then turn it back on
the tank then gets a blast of white crud that builds up on the inside of the
pipes.

I hate that !

Put a net in front of the return ? I'm never ready for it !!!

TIA,
Chris