GEO method for us too. Sometimes we can't find the powdered water softner & use the liguid, still works great. Here is that link:sites.google.com/site/cbruni/
Steve & Sharon
'13 Dodge Citadel (hers)
'12 3500 Dodge Mega Cab 6.7 Cummins (his)
'12 Crossroads Rushmore RF38FL (ours!)
Barry, the ADHD x 2 German Shepherd mix, Granddog.