Kalkwasser dosing advice

[spedly]

Originally Posted by whatcaneyedo

One item for consideration: kalkwasser can do a number on pump impellers. Either clean the pump frequently with vinegar or be prepared to replace the impeller from time to time. Little maxi jet pumps are especially susceptible to wearing out in my experience.

That's good advice. So to clarify, are you referring to return pumps/powerheads in the aquarium? Or the pumps in the Kalkwasser storage/ATO pump? Or all pumps in general?