Pool scum I cant remove

Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
Kylie

Pool scum I cant remove

Postby Kylie » Fri 14 Oct, 2016 00:34

Hi Everyone
I am really hoping someone can help me as I am at my wits end.

Hubby and I only recently purchased a new house (our old house we put a inground pool in).
Anyway this property comes with an inground pool

Our problem is the pool obviously has been neglected for years...

Finally we have the water crystal clear BUT.........

Over half of the bottom of the pool, the steps and some of the walls are covered in what looks like sand (same color) but is hard as rock. We have tried sand paper to remove it - sharp brushes - you name it. Its sooooooo hard.

Has anyone ever had anything like this - or knows of a chemical that may soften it. We have no idea how to get it off. The pool is not vinyl so it wont put a whole in it (hence the sand paper we used) it did move it a bit but would probably take us years to do this whole pool lol.

Please someone help :)


Denniswiseman
Swimming Pool Superstar
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Posts: 339
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: Pool scum I cant remove

Postby Denniswiseman » Fri 14 Oct, 2016 02:44

It may be calcium scale
Can you post a full set of numbers back here
Do you have your own test kit
Have you tried muriatic acid in a shallow area
DavidSwimmer
Pool Newbie
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Posts: 5
Joined: Sun 16 Oct, 2016 20:24

Re: Pool scum I cant remove

Postby DavidSwimmer » Sun 16 Oct, 2016 21:00

Hi Kylie,

I don't know if this will work for this problem, but I've used Naval Jelly rust dissolver on things other than rust before... and it's worked wonders.

When we first moved into our house the pool had some intense, long-neglected algae scum in some tight corner crevices. The standard pool stuff you get at the store (I think I bought "Wet and Forget") didn't do a dang thing for it.

But my dad told me I should try Naval Jelly. (He's an old salt and said they used it all over his ship to clean more than just rust.)

I put it on, let it set for 24 hours, and presto the algae was history.

It sounds like what you have on there is stronger than just algae, but don't underestimate this stuff. It works.

Good luck and let me know if it helps!

-DS
Denniswiseman
Swimming Pool Superstar
Swimming Pool Superstar
Posts: 339
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: Pool scum I cant remove

Postby Denniswiseman » Mon 17 Oct, 2016 03:06

Hi David
I don't think that will work under water as it washes off with water and it's Phosphoric acid based so Muriatic acid will do the same using the Purity Pool Underwater Acid Wash Kit . That's if muriatic acid in a shallow area moves it as I suggested
http://www.loctiteproducts.com/tds/S_TRMT_NAVAL_tds.pdf
DavidSwimmer
Pool Newbie
Pool Newbie
Posts: 5
Joined: Sun 16 Oct, 2016 20:24

Re: Pool scum I cant remove

Postby DavidSwimmer » Tue 18 Oct, 2016 13:09

Denniswiseman wrote:Hi David
I don't think that will work under water as it washes off with water and it's Phosphoric acid based so Muriatic acid will do the same using the Purity Pool Underwater Acid Wash Kit . That's if muriatic acid in a shallow area moves it as I suggested
http://www.loctiteproducts.com/tds/S_TRMT_NAVAL_tds.pdf


Oh that is a good point. To be honest I thought the pool was drained for this operation.

-DS

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