You only put in what you need, when you need it.

I add baking soda maybe once a season. I add borax 2 or three times--when my pH is low.

I add bleach all the time, every 2 or 3 days.

You add bleach when you need chlorine.

You add borax when your pH is too low.

You add baking soda when Total Alkalinity is too low.

How do you know? You test for it. We talk about the test kits all the time.