where can i find the maintenance indicator on an eheim professional II filter?

Question

i have an eheim professional II (2028) external filter. i read that one of its feature was a maintenance indicator. can anybody tell me where i can find this?

Answer 1

I don't have one of these filters, but it's probably the flow indicator on top of the filter at the output connection. As it gets more and more red it's more and more time to clean / replace your media.

MM