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any chance of having someone with some common sense come out and dose the tub with dichlor a couple times per week?
I don't see any reason not to drain it. Be sure to take a shop vac and blow as much water out of the plumbing as you can. Upon your refill I'd give it a heavy shock to kill any critters that may have been living in the plumbing.
I am about to go away for 3 weeks and was thinking of leaving the spa empty. Would I be better off with it filled and using some kind of floater to dispense the sanitizer. If so what kind of sanitizer can you use in a floater.
The only sanitizer that is OK with every manufacturer is bromine. Some manufacturers say it's OK to use trichlor but check with your dealer first.
Only bromine? Which one(s) has issue with using dichlor?