My pool was built with SWG. When I bought the house they had pulled out the SWG electrode and were on chems. I've been BBB for most of the last year and I'm already seeing the cost of bleach is getting to the point where converting to SWG even at 2x the cost of bleach might make some opportunity cost sense.
Even a service is getting near the cost of all this bleach and testing supplies and muri. My time is still worth something....
Can you run SWG during swim season and go BBB during off season? Is this a proven method? That's my main question. Even if the answer is no, then math wise it still may be worth it to me to put the system back in.
i am advantaged in that the controller is still functional so my upfront cost is much lower than a straight install.