danbfree

Thank you, since our spa never sees any direct sunlight (large umbrella covers it) and only even indirect light when used, maybe 30 min to 1 hr a day I will be using the liquid pool chlorine from now on, just very occasionally using up the dichlor powder to keep a little CYA in there. I can get 10% pool chlorine for the same price as even generic plain 7.5% bleach, so it will be very economical to keep up that way, just a little splash of it after every soak in our little 210 gallon tub. Thanks for clarifying!

So liquid pool chlorine at 10% sodium hypochlorite is literally the same as household bleach, just a bit stronger and without added stabilizers that dichlor and others add? I've been struggling to get CYA levels down after years of putting "whatever" pool chlorine in my spa so I'm going to do a flush and fill and start over using the method on page 1...