i am very new to pool maintenance, just starting at the end of the summer last summer. I switched over to chlorine this year...and it has been a god send. when i moved into our new house they use baq, so i kept up with it, not even a week later i dumped 150 dollars in chemicals into it. switched over this season and haven't yet come close to that mark, still under 100 bucks and the water looks 100 times better. Also from the impression i got from the pool store people baq. isn't as good as chlorine...even though they will try to push it on you. my opinion is chlorine all the way.