Posted about my pool in another thread but also have a stand-alone hot tub. Old owner told me he would just add some magic solution that kept it good for a couple months at a time. But I tested the water with a hth strip and there was no chlorine at all. I found a bottle of spa shock in the shed and dumped in about a cup or two which I now think was too much because I tested it today and the chlorine is pretty much off the chart (I found a better test kit today and using the dropper, the water is a color not even on the chart).
Anything I should do? Will it regulate on it's own? The rest of the numbers are in the proper range according to the chart.