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By
03/04/2009
Off hand I don't know, but I do know they list the phospherous content on the boxes and bottles of automatic dishwasher detergent. Just take a look at them next time you are shopping.
By
03/03/2009
We have hard water as well and the ONLY dishwasher detergent that was high enough was cascade, no store brand came close, we checked.
By
03/02/2009
Perhaps to be safe, warranty and otherwise, you should contact Whirlpool ... This link has a 'search' tool and a contact link:
http://www.whirlpool.com/home.jsp
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