I have always used bottled water , buy it by the gallon - 99 cents . I found delicous spring water hsd it tested
and was pure and great water . So I started using it in my Keurig and it started making all this grumbling and popping noise when it brews . So , I descaled it and went back to botttled water , and it is fine now . Must
be the spring water is loaded with minerals , and that is good for you , but not the Keurig .