Leaving for 9 days

[XsAllOverIt]

I'm going on vacation for 9 days this coming week and the weather is forecast to be above freezing the entire time.
My pool is still winterized, so I'm OK there, but my hot tub is running 24 hr/day on the pump. I average 1/4 cup muriatic acid and 1/2 cup clorox every other day to keep everything balanced. The hot tub is set at 70 degrees.

How could I leave for 9 days without having any issues and noone adding chemicals?

 

[JasonLion]

Over nine days you can't guarantee anything. Still, if the tub is covered and you bring the PH down to say 7.0 and the FC up to shock level shortly before leaving you will probably be fine, especially if your TA is reasonably low.

 

[Richard320]

Drain the hot tub? It's only 600 gallons.

Or try shocking it like Jason says. Cover it to keep the UV from consuming chlorine. Even a cheap blue tarp would work. And if it does go green, again, it's only 600 gallons.

 

[XsAllOverIt]

We've been hitting 27-28 degrees in the mornings. I think I'll shock it good add a little muriatic acid and turn the heat off and let it run. The temps are supposed to be in the 40s (low) all next week. We're opening the pool the day after we come back. It will be an interesting journey this spring.