My Super 55 manual says to not use a regular tire gauge for Calcium Chloride-filled tires, as it will ruin the gauge. I really don't want to ruin my gauges, but it's time to service these tires. It seems that they are filled with calcium chloride, as I saw a small amount of liquid leaking out of one of the valve stems once. 
Anyone know what to use, &amp; where to get it? 
Thanks!