Can liquid chlorine lose it's punch after a couple of years of sitting in the shed? I use the liquid variety for my AGP. I needed to raise the chlorine level, and used some from a bottle that had been sitting for 2 years. Before adding, I took a bit of a smell, and then a deeper one because I couldn't detect anything. It had absolutely no smell at all. Like smelling a jug of water. Shouldn't it kind of smell like Clorox?