If you are clean before you get in the tub, the tub will stay clean. If you have a lot of skin lotions, you sometimes have to add " Foam Out" to get rid of the bubbles or break them up.
I never had any issues with simple Bromine and we used it daily.
Maintain the PH of the tub, and you will void many issues.
Bromine was simple, and as long as you keep it simple it works.
We did have 2 filters, 1 in the tub and the other soaking in cleaner.
Our Ozonator lasted 4-5 years. Did not replace it after it went out, and did not see any differences.
We usually did a water change in the Spring and in the Fall.