Natural way to keep a hot tub clean?

[Woodland]

What was once our birthing tub has become our lovely outdoor hotub! I have pretty much left the hot tub maintenance to my husband but we are out of chemicals and I am not sure we have been using the most natural stuff. We have been using no chemicals lately but we have to drain it more often and that seems like a big waste as well. There is a lot of random stuff on the internet about some chemicals being safer than others, so I am hoping some of you wise mdc mama's can tell me what you do to keep your tub clean?

[Drummer's Wife]

We fill it with hot water and white vinegar, then run the jets for 20 min or so.

Eta: sorry! We have a jacuzzi inside, not an outside hot tub. If you leave water in it, I'm not sure how to keep it clean/sanitary w/o the icky chemicals... Hopefully you get some good ideas.

[Tizzy]

A relative of mine uses peroxide. Their pool supply store actually recommended it and they buy the peroxide from them. Although some natural farm feed companies will sell a 45gal drum of 35% peroxide for a fair bit cheaper.

It is LOVELY to sit in! No chemical smells, it leaves your hair and skin so soft and smooth, just so much nicer overall.