Are sulfates a problem in Salt Water Pools?

Problems relating to pH and total alkalinity.
Increase ph, increase TA. Reduce pH, reduce TA.
pH chemistry advice and techniques for the pool.
kamkuda
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Are sulfates a problem in Salt Water Pools?

Postby kamkuda » Wed 26 Oct, 2016 13:42

I was told to stop using dry acid in my salt water pool because it adds sulfates to the water and they stay there. The levels will increase because I have to lower ph regularily.
The sulfates will then create scale.

What kind of scale?
Will it be on the salt cell or the surface?

I dont like to handle liquid acid very much


Denniswiseman
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Re: Are sulfates a problem in Salt Water Pools?

Postby Denniswiseman » Thu 27 Oct, 2016 03:20

Look at this link
http://pwtag.org/technicalnotes/sulphate-attack/

Muriatic acid is pretty noxious but if you take the correct precautions Gloves, Goggles and Mask you should be OK
Don't use a surgical mask as they are pretty useless for filtering the fumes I use a 3M 4277

You might want to address why your pH rises, do you have a waterfall, fountain or other aerator
kamkuda
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Re: Are sulfates a problem in Salt Water Pools?

Postby kamkuda » Thu 27 Oct, 2016 20:40

Is dry acid ok then. Are sulfate an issue?
Denniswiseman
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Re: Are sulfates a problem in Salt Water Pools?

Postby Denniswiseman » Fri 28 Oct, 2016 05:33

Did you not read the link.
Prolonged use will attack cement grouts, tile beds, screeds, rendering and concrete.
The problem is not as bad with fibreglass and vinyl pool but crystals will form after prolonged use and will be difficult to remove without reverse osmosis or water change
I think your first priority would be to determine why your pH keeps rising (you didn't comment on waterfall, fountain or other aerator)
If you update your profile it will help others determine how to help
kamkuda
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Re: Are sulfates a problem in Salt Water Pools?

Postby kamkuda » Fri 28 Oct, 2016 10:39

Thank. No just a salt water pool. No waterfalls etc. I assumed that ph rising was a normal occurrence with salt. I was told it creates chlorine and a high ph at the same time. Actually twice as much high ph for every pound of chlorine created. That is why I had to use a ph reducer reguarily
Denniswiseman
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My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
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Re: Are sulfates a problem in Salt Water Pools?

Postby Denniswiseman » Fri 28 Oct, 2016 10:59

What is your TA as lowering it may help reduce your rising pH
kamkuda
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Re: Are sulfates a problem in Salt Water Pools?

Postby kamkuda » Fri 28 Oct, 2016 22:03

The pool is closed now but I was maintaining it about 80
Denniswiseman
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Re: Are sulfates a problem in Salt Water Pools?

Postby Denniswiseman » Sat 29 Oct, 2016 02:50

When you open again try lowering it to 50ppm
A lot of people who get raising pH have dropped it to 50ppm
A lower TA will not be a problem if you stabilise your pH
kamkuda
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Re: Are sulfates a problem in Salt Water Pools?

Postby kamkuda » Sat 29 Oct, 2016 08:11

thank you
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