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Most of it depends on the load in your tank and the type of filter.

I usually do the back flush every 2 - 3 months and a tear-down every 6 months. I have never really noticed a slow in the water flow in the Eheims even after 6 months, so I just use the above schedule with good results.
 

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Discussion Starter · #5 ·
JanS said:
I have never really noticed a slow in the water flow in the Eheims even after 6 months, so I just use the above schedule with good results.
That is why I ask because my Eheim just keeps working. I let it go 3 months once after reading that other Eheim users wait that long but boy when I cleaned it then I really was dirty. I am an ex-reefer and I guess I am still concerned about that crud still being in the tanks eco-system.
 

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I'm curious if the Eheim Pro II's flow indicator actually helps indicate whether or not it's time to clean your filter?
 

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I clean my Fluvals hoses once a month, rinse out sponges & replace floss weekly/bi-weekly, clean propellar as needed.
 

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Raul-7 said:
I'm curious if the Eheim Pro II's flow indicator actually helps indicate whether or not it's time to clean your filter?
Good question.... I forget to even check mine since the hoses are turned toward the wall, and it's under a stand so it isn't easily visible. I'll have to remember to check it next time it's cleaning time.
 

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Flow indicator

I never use the flow indicator, I see the water getting less clear than iIwant, and I find the canister is cruddy, about every 2 months.

I do not use a prefilter and the intake is right against the gravel so I may be pcking up more crud than is necessary (but the gravel is really clean)
 

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I actually took out the ball used as an indicator in my Eheim 2026. I kept getting a slight rattle and it went away when I took it out.
 
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