I need to exercise in water because of damaged joints. I moved to be near a community College to use their pool. However, Covid put a stop to that so I bought my own exercise pool because I've been gaining a lot of weight from not exercising. It's an iPool and is small compared to the pools most people have here at 2,000 gallons. It has a cartridge filter and a Hayward heater. The pool is setup in an insulated pole barn with heat and AC as well as humidity control and automatic venting. Getting the pool water chemistry correct is a bit of a challenge. The water is consistently alkaline. I may have received some bad advice using bleach for chlorination and Muratic Acid to lower alkalinity. I have the pump running when I add chemicals. I think I added the Muratic Acid (8oz 31%) too close to adding bleach for chlorination. I got a small release of what I think was chlorine gas which I vented immediately and I left the building. I'm looking forward to going to pool school and getting everyone's valuable feedback on insights here.