I'm just getting started. I am using a 15-gallon gray Stenner Pump/tank combo unit to add 12.5% chlorine solution to the pool. The tank will be indoors as this is an indoor pool. A couple of questions: 1. How long will the chlorine solution last in this container? The equipment room will be kept at a constant 70 degrees. I've read that the solution breaks down over time. 2. I am wondering if I will smell the chlorine in the equipment room since the filler cap isn't a screw-on type but just sits over the opening. Does anyone have experience with a Stenner combo used indoors?