Hi all, new spa owner, 5 y.o. Hot Spring SX, previous owner said he used bromine.
Drained the tub, transported it, cleaned it with vinegar (minor scale present), rinsed and filled. (Will do a de-gunker soon during first drain.)
Decided to go with N2 method, with daily additions of dichlor.
So far so good. TA is good, pH is good. When I test after 20 mins of adding, FC looks good at ~2-3ppm.
Hours later, without bathing, I'm seeing the FC drop right off and the total bromine at "normal" levels (~5ppm I think)
I think I read somewhere that this will happen if you straight switch from bromine to dichlor.
I'm guessing there was some bromine water in the pipes that didn't get fully drained.
Is this an issue with my sanitizing regime? Anything I should do now or watch for? Switch to daily MPS?
Thanks