Leaving' on a road trip today. Used advice on this forum for treating a spa before leaving it unattended for an extended time. Here's what I'm doing.
Steps taken before leaving on trip:
Switched spa to SLEEP mode, which heats water to within 20 degrees F. of set temp only during morning and evening 2-hr filter cycles.
Lowered set temp to 80 degrees F.
Added 1 cup 8.25% bleach to raise Br- up to 30+ ppm
Dialed the Life Spa floater all the way out to the very first thread (way beyond all the settings numbers) and filled it with brom tabs (Leisure Time)
Turned off all air jets.
Turned off waterfall.
Spa is covered.
I'll let you know what I have when I return next week.
What you see is half of the brom tabs. The other half is inside the blue.