I just joined this AM. I have an inground pool about twelve years old. I ditched my SWG when my third one only lasted about 60 days, and have been using tabs & shock for about three years. The result is CYA over 180, and I'm now draining my pool. I see now tabs are not the fix I had thought or maybe these are, I'm not sure. I'd like thoughts on sanitizing the pool water going forward. Please share any successful approaches based on your experiences. Thank you.