The all chlorine method might be too time comsuming for my son. Seems like the pool BBB a little easier as you don't have to deal with CC as sun takes care of that as long as FC/CYA is at minimum. I may have him try Sodium Bromide reserve with Renew oxidizor. Thank you for your reply.
I use all chlorine, and no SWCG in my hot tub. I do not find it time consuming. It is something that needs pretty regular attention. So if your son is frequently away from home for 5+ or more days, then that may be an issue. Otherwise, once I get things stabilized after a water change, out of a 7 day week, I spend about 5 minutes on 3 or 4 days of the week, and maybe 15 on one other day.
During the week I test pH, FC, and CC. I use a pH meter, so I grab a cup of water from the tub, fill my test vial for my FC/CC test and drop my pH meter in the cup. While the meter is settling I run the FC/CC test.
I then add any needed acid to the cup of water and add to the tub (it is a graduated cup). By the time I put the acid away, and the test equipment away, it is time for chlorine. I add however much bleach I need. That is about it on a week day. I also do not do this every day - I skip a day here or there. If I am going to be away for a couple of days, I run the FC up to shock levels before I go.
Once a week I do a full battery of tests (maybe not CH, because that never changes after I dial it in). Adjust anything as necessary, and also add a dose of Aqua Clarity. While I am doing that, I also pop out my jetpacks and wipe down behind them (as well as wipe down the waterline) and hose out (or change) my filter cartages. That takes me about 15 minutes.
If we use the hot tub, I add bleach afterward (1 oz per person per 30 min is my rough estimate).
It is really not that much work to maintain. After a water change it is a bit more work, because I am trying to dial in TA and CH and CYA (using Dichlor). The dialing in process takes about 7 to 10 days for me.