How much chlorine do you use during pool season
The answer to that is going to depend on a LOT of variables, thus the answer is not important.
Chlorine use depends on a huge number of factors, including, but not limited to:
1. Amount of sunshine
2. Bather load
3. Evaporation
4. Local weather conditions
5. Amount of rainfall
Instead of focussing on "how much should I use" - you need to keep it just about under 3ppm free chlorine.
Lots of folks espouse salt-water chlorine generators (i.e. salt pool, saltwater pool, etc) and I even worked for a major manufacturer (Autopilot) , so i was sort of partial to them for a while. Truth be told, it doesn't matter what you use, you need a certain amount of sanitizer and it takes a lot of attention no matter what you use. Nothing is plug and play, and the systems that automate a lot of it can be quite expensive.
The answer is to read and understand pool chemistry, that is YOUR pool chemistry, not what the manufacturer recommends. They know how to build pools, not how to own them.
For what its worth, I'm sure some folks have no idea what a saltwater chlorine generator is:
You add a couple bags of pure salt to your pool, to bring the salt level up to a few hundred PPM if I recall. It's under the level that you can taste. You don't get oceanwater, you can't taste it. It feels a little different on the skin for sure. Silky almost. The pool water is pumped through a set of plates where electricity is applied. The power (about 250W for an average pool) splits the salt into free chlorine and sodium, which cleans the pool and recombines later into salt.
The process continually increases alkalinity, requiring acid every so often. Once an equilibrium is reached, provided you don't have a sudden storm or a massive kids party you can almost let it ride. You still do need chems for algae blooms from time to time, and to adjust when it really gets hot, and every so often you gotta add chlorine to supplement.