Bromine is confusing. One thing I don't really understand is why it is necessary to keep adding bromine after a reserve is established. Seems you should be able to simply add chlorine, either liquid or tabs, and that would continually activate the Br reserve, without the very high cost of bromine tabs. I have tried this over the past week or so since posting on the subject of bromine to chlorine conversion and it isn't effective. Br/cl level spikes with addition of bleach or oxidizing shock, then quickly drops off to zero. Continuous Br feed seems to be required. Even then, at max feed setting, Br never rises above 1 ppm. I still don't get why I can't just switch to cl tabs and run a cl pool (without emptying the pool first). Bromine tabs cost fortune and are getting worse.