Does anyone else have problems with Ca
buildup inside the impellor assembly of their pumps? Just recently, both my skimmer and Mag 7 return shut down due to the build up on the impeller and housing. Upon opening the pumps up, the impellor was coated with brown, rocklike Ca
(I'm pretty sure it's Ca
Soaking the assembly in hot vinegar causes a reaction that breaks up the coating. If not for that fact, it would be nearly impossible to remove.
So...is this common? If not, can anyone offer an explanation why it is happening to me? I'm dripping kalk
24/7, but ca
levels are not unusually high. I do weekly water changes (Kent salt). I last looked at the pumps about 6 months ago.