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Salt without salt water system

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bud16415:
I have been doing it for a couple years. My tub is 350 gallons and I add 7 lbs of salt. I like the feel of the water much better also.

I started a thread about it at the time with some searching you should be able to find it and others comments.

I start off with salt and use dichlor until my cya gets up around 50ppm and then I switch to household bleach when it drops to 30ppm I switch back. I will add the water seems more stable after I switched to the salt.

I haven’t seen any adverse effects to the tub with the salt, but shortly after I started it I had a pump leak. I did a wet end pump replacement. I don’t think it had anything to do with the salt and the other pumps and heater are doing fine

Mtbob:
I didn,t know you could use liquid bleach in the hottub.I add 1 teaspoon dichlor every day and allthough the chlorine levels are fairly low after a couple of hours the water stays clear and has little smell.I also ad half a cap of MPS every other day.One thing I have noticed is that the Cyanuric acid levels are slowly going up.I understand that is because it is an ingredient in the dichlor.If I would switch to liquid bleach would that level actually go down or would it stay at the current level? Also does a teaspoon of dichlor have the same effect as a teaspoon of liquid bleach?And finally is there a dichlor on the market that does not contain Cyanuric acid?

Sam:
That's the exact reason for switching to bleach is to prevent cya build-up which causes chlorine lock (reduces effectiveness).  CYA will come down over time necessitating a switch back to dichlor.  You need more than a tsp of bleach though.  I thought I read that it's a quarter of a cup but I forget the exact amount.  When I did this program I never actually measured it out.  I would just pur a "glug" in after each use and it worked out.  Occasionally I would pour a larger amount of bleach in.

bud16415:

--- Quote from: Sam on December 02, 2021, 06:31:54 pm ---That's the exact reason for switching to bleach is to prevent cya build-up which causes chlorine lock (reduces effectiveness).  CYA will come down over time necessitating a switch back to dichlor.  You need more than a tsp of bleach though.  I thought I read that it's a quarter of a cup but I forget the exact amount.  When I did this program I never actually measured it out.  I would just pur a "glug" in after each use and it worked out.  Occasionally I would pour a larger amount of bleach in.

--- End quote ---

I have a good size 6 person tub and have found about a tablespoon of dichlor when the two of us use the tub after showering is about right and when the stabilizer reaches 50ppm I switch to bleach. About 1/3 cup of household bleach = 1 tablespoon of  dichlor. Be careful with the bleach you buy. Pool bleach is good as is non scented and not the thickened easy pour bleach. Both of them will cause foaming. Good old Clorox works good but you pay a little more for the name.

When the stabilizer drops to 30ppm switch back to dichlor.

The number drops slowly and if you add water it will drop.

We live where it gets very cold mid winter and if I’m ready for a water change and to lazy to drain and clean the tub I will just drain it half way and refill and it gets me a couple months to warmer weather. When I do that I have to start back in with the dichlor for a while.       

A.O.:
I use my 450 gal tub twice a day almost every day and I add 2 1/2-3 oz of 12 1/2% pool chlorine after every use. Keeps my FC just where I want it. And I never add MPS to my tub, it is not needed.

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