As far as I know, you don't have to use bleach. It can be damaging for the bath. I have a hot tub at home, and I don't use bleach, never! Bleach can deteriorate filter media and permanently damage your hot tub cover. I would recommend using white vinegar and water in a bucket or spray bottle. That is the way I clean my hot tub. I have it for two years already, it doesn't need much maintenance. And having a saltwater hot tub has a lot of benefits for me, I've ordered it from this site https://poolcareschool.com/salt-water-hot-tub/. When I lay there, my skin becomes softener and saltwater soothes it. It's very important for me because I'm 56 and my skin is no longer elastic as it was.
