How often should the filter tubes be cleaned

[White Lightning]

I was reading that it is a wise idea to clean the tubes for your filter as they could clog causing less of a flow. So... how often should they be cleaned?

[328iGuy]

I would only clean them if you see they need to be done, if you notice less flow or clogged.  I have had my Eheim runnning for 5 years and have never had to clean the tubes yet.

[beowulf]

Another time would be when you see junk coming out.

[fishycanuck]

I rinse out the tubes in my HOB filters once every few months, just to flush out the big chunks  but have never cleaned the tubing for my Eheim.

[gonna_b_no_1]

I clean mine when I can't see through them anymore   

[White Lightning]

Thanx everyone! That answered my question.