Need help cleaning black granite

Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
shane_rubin_2000
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Joined: Sat 04 Mar, 2017 13:19

Need help cleaning black granite

Postby shane_rubin_2000 » Sat 04 Mar, 2017 13:25

I can't find a way to clean the white foggy look from the surface of my black granite pool. It looks fine when water is rolling over but when it dries, it looks horrible. I'm not looking for a perfect glossy finish, although that would be nice. Acid works on the large white build up in the grout but not on the haze. Any[img]https://uploads.tapatalk-cdn.com/20170304/4baf72cf1c77f89f0c6ec0439f1e04d5.jpg[/img] thoughts?

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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
Location: United Kingdom

Re: Need help cleaning black granite

Postby Denniswiseman » Sun 05 Mar, 2017 17:24

How long have you had the pool and when did the foggy stain occur
Is it all over or in selected spots
It looks like calcium acid should work on it, what acid and strength are you using
I'm wondering if the granite has been etched
shane_rubin_2000
Pool Newbie
Pool Newbie
Posts: 2
Joined: Sat 04 Mar, 2017 13:19

Re: RE: Re: Need help cleaning black granite

Postby shane_rubin_2000 » Sun 05 Mar, 2017 17:37

Denniswiseman wrote:How long have you had the pool and when did the foggy stain occur
Is it all over or in selected spots
It looks like calcium acid should work on it, what acid and strength are you using
I'm wondering if the granite has been etched

We just moved in 8 months ago and its been like this the entire time. It's also our first pool so we're newbies when it comes to these matters. We've been using a 1 to 4 diluted muriatic acid on the calcification build up.

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Denniswiseman
Swimming Pool Superstar
Swimming Pool Superstar
Posts: 649
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: Need help cleaning black granite

Postby Denniswiseman » Mon 06 Mar, 2017 05:49

Can you actually scrape off any of the stain
The fact that acid works on the grout and not the granite makes me think it could be etched
When water is flowing over it looks OK so there can't be any buildup of calcium which you would still see
Can you try a Granite polish to restore the smooth finish

A full set of levels would help see if the water is balanced
FC:
TC:
pH:
TA:
CH:
CYA:
Pool chemicals:

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