CYA in a bromine spa

[Macpharlan]

Thank you.

My original concern was if I needed to measure CYA ( like you do in a pool or a chlorine hot tub) and dump the water when it gets too high. I hadn’t been paying attention to that reading.

When I started with this spa and decided to do bromine rather than chlorine, I thought that meant no dichlor should be used at all, just MPS.

Thanks for all the info here. I have been using dichlor to sanitize my spa for a couple years now and am always having to drain due to the CYA getting to high. I just recently was given a bucket of bromine tabs and plan on making the switch, I have been gleaning lots of info from this site.