IanMcLoud

YES! Thaaaaank you! (Yeah, I didn't want to put ice melt in my tub

Using my Taylor 2106 test kit and instructions found on here (thanks @waterbear) I have gotten all my parameters in order for my Evolution Monarch 480 gallon hot tub from Costco... Except the calcium hardness, which seems to be testing at only 30 ppm (I live at elevation in the mountains of central oregon and it seems this is the expected value, I'm on well water near the city of Bend). What is the best way to raise calcium hardness to 150-400ppm? Calcium chloride seems to be the answer... but using bottles of Leisure Time tub calcium booster seems like it will be an expensive and bulky proposition (that's basically a whole bottle for one hot tub fill!). Google is telling me that calcium chloride is also the chemical compound of the ice melt for my driveway... so can I use that? Is there a better way? Thanks!