Stop the crud

[PeterEde]

When restarting return pump I get a lot of crud from the pipe.
How to stop this?
Do I need hard plumbing?
Assume its some form of algae growing inside clear silicone tubing?

 

[Lavey29]

When restarting return pump I get a lot of crud from the pipe.
How to stop this?
Do I need hard plumbing?
Assume its some form of algae growing inside clear silicone tubing?

Or it's building up inside your pump.

 

[mdb_talon]

Wrapping silicone tube with black tape can help limit algae growth inside

 

[Garf]

When restarting return pump I get a lot of crud from the pipe.
How to stop this?
Do I need hard plumbing?
Assume its some form of algae growing inside clear silicone tubing?

I consider it nutrient export, if you are mechanically filtering.