I had a bad time with cal Pump. They were close and i got a good deal HA! It ran sporadically.
Gave me fits. The filter was impossible too. gee, I hate blasting these folks, they treated me well when id go see them, but those are that facts Ma'am.
I NOW have a Sequence Pump from Gene at Koi Village (they are readily available elsewhere too)
I have a Skippy" filter, guess what? Problem free! Oh I did have to clean gunk out of the pump after almost 3 years