I have a strong spa S61001, and the pump doesn’t seem to be running properly. The jets on one side of the hot tub look to be stronger than the jets on the other side of the hot tub. There’s only one pump on this hot tub. Does this look like calcium buildup in the lines? Could this be why the jets don’t seem as strong? We’ve already checked an air lock, but that didn’t help and we changed to a brand new filter also. Thanks!
