pH & Total Alkalinity

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CO2 vs Muriatic Acid

by Pool Gec » Mon 08 Jan, 2018 12:04

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CO2 vs. Muriatic Acid : Question Assuming a balanced pool, how much CO2 would be used to manage pH verses the same pool using muriatic acid

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To be fair Pool Gec, there is a lot depending on it. The only pool I have worked on that used CO2 was a small hotel. Being small they didn't buy in...

3 Replies

585 Views

Last post by Teapot
Thu 11 Jan, 2018 15:40
Keeping TA up in small tub

by iamcanadian » Fri 13 Oct, 2017 00:00

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Hello Pool People, My issue really isn't an issue other than down time. In my public aquatic center we have 2 small hot tubs ( one at 500 Gallons...

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Are these hot tubs aerated as this will increase pH with no effect on the TA
So if you are lowering your pH with acid because of the aerating making...

3 Replies

415 Views

Last post by Denniswiseman
Fri 13 Oct, 2017 09:56
Muriatic Acid versus granular acid
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by DARTH DOUGY » Thu 12 Feb, 2009 15:31

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My question is in two parts:

(1) Is Muriatic acid in liquid form better to lower TA than granular products? I read an article that states that the...

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If you are currently reducing your pH up to twice a week then you may be aerating your pool water (fountain, infinity edge, waterfall or other...
34 Replies

80318 Views

Last post by Denniswiseman
Mon 09 Oct, 2017 02:27
PH went from 7.5 to <6.5 OVERNIGHT?! Help!

by Terribly Inept » Sun 24 Sep, 2017 03:02

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Hi all, hopefully someone can help me as I am utterly bemused by what is going on with my pool chemistry.
My pool is 10,000 gallons. I use a...

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Check your Cyanuric acid you may not be adding enough chlorine because your CYA is to high
An indoor pool only needs 20-30ppm CYA
Check out Chlorine...

1 Replies

449 Views

Last post by Denniswiseman
Sun 24 Sep, 2017 15:03
Alkalinity test on machine versus Taylor test kit

by Aaron19 » Thu 27 Jul, 2017 19:16

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I checked my Alkalinity using Taylor test kit. I got 110ppm
I went to a store and they checked it to a machine, they got 69ppm only.
Then they test...

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It's nicer to have a people that willing to help and share some very important information. I'll be here for my pool maintenance. I got more issue on...

4 Replies

556 Views

Last post by Aaron19
Sun 30 Jul, 2017 10:02
Very Low T.A. and dropping overnight

by monkeyhanger » Tue 16 May, 2017 05:55

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hi All, new to the forum and looking fir some help.
We have a 25mx10m pool (school) 0.8m shallow to 1.8 deep
The problem we have is constant low...

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Hi Andy
I've sent you a private message as there is an email to a more professional person who may be able to help you

3 Replies

585 Views

Last post by Denniswiseman
Tue 16 May, 2017 13:44
Sand in the bottom of my pool - can't fix
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by sandinmycrack » Tue 20 Jan, 2009 22:39

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I have had a slow but steady build up of sand from my filter on the bottom of my in ground pool for several months now. It first accumulates on the...

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20 grade silica sand is what you need 40 is smaller and can find its way through the laterals
14 Replies

27831 Views

Last post by Denniswiseman
Sun 07 May, 2017 09:31
Can't Raise PH levels / soft water
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by Guest » Sun 30 Apr, 2006 16:25

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I can't seem to get my ph increased. Current readings are TA=160, PH=6.8, CH=250, Cy.Acid=95. Vinyl Liner pool in Minnesota. I did fill it with 50%...

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I've been having the same problem water is cloudy and oh low have been a aerating 3 hours and I'm already starting to see bottom of my pool, love...
14 Replies

42168 Views

Last post by Serenna
Fri 21 Apr, 2017 11:28
Structured approach to salt water pool chemistry, help please.

by Cameljockey » Sat 14 Jan, 2017 00:02

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HI all, I'm new to pool ownership but think I understand the basics, however re-starting a 55,000 litre pool is proving confusing. I would ask in...

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I use the Taylor K2006C which I have to get from the states as it's not available here in the UK
Have you checked out those links as there is a lot...

3 Replies

867 Views

Last post by Denniswiseman
Wed 18 Jan, 2017 16:38
High pH, normal TA, adding acid doesn't decrease pH

by jamescookmd » Sun 27 Nov, 2016 19:12

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I'm adding lots of muriatic acid to my pool and the pH doesn't change.

pH 7.9, FC 4 ppm, TC 4 ppm, TA 100 per Taylor test kit.
pH 7.9 per electronic...

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Hi James
A few questions
How do you chlorinate? A SWG tends to raise the pH
Do you have a waterfall or other form of aeration which raise's pH?
Does...

1 Replies

722 Views

Last post by Denniswiseman
Mon 28 Nov, 2016 05:22
Are sulfates a problem in Salt Water Pools?

by kamkuda » Wed 26 Oct, 2016 13:42

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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...

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thank you

8 Replies

1198 Views

Last post by kamkuda
Sat 29 Oct, 2016 08:11
CYA not measureable?, TA high, ph Low

by eswenson » Tue 07 Jun, 2016 20:15

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I've got a 40,000 gallon pool with a CYA level that I can't measure (I'll explain), a TA that is now about 140ppm, and a ph that is 6.8 after adding...

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Ok, I'll get some cyanuric acid to try to raise the CYA. I'll put some liquid chlorine in in the mean time.

I have no idea why pH has gone up. I...

7 Replies

1265 Views

Last post by eswenson
Mon 10 Oct, 2016 16:47
Muriatic Acid did not lower Alkalinity
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by andre747 » Mon 29 Aug, 2016 18:46

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Hi everybody. I need help. Here are the steps i did. Took over a pool with high chlorine, no alkalinity, no PH, no CYA and hard 400 ppm. Waited for...

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Don't raise the CYA untill any drain and refill is done
You may wish to give Muriatic acid another go as your previous dosing may have thrown things...
11 Replies

2507 Views

Last post by Denniswiseman
Fri 09 Sep, 2016 12:51
Alkalinity targets different

by lmelanson » Sun 21 Aug, 2016 14:17

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Hi, I am new to your site. Received the TF 100 and started testing. I have owned the pool for 7 years so I am not new to water chemistry but am a...

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BioGuard largely promotes use of Trichlor tablets which are net acidic so need a higher TA level to have more carbon dioxide outgassing which raises...

5 Replies

903 Views

Last post by chem geek
Tue 23 Aug, 2016 06:40
Pool water greenish?

by jkik » Wed 29 Jun, 2016 19:23

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Okay so my pool water looks clear green. Could it possibly from the chlorine and blue liner?? I have a 3300 gallon above ground pool that's is 14 x...

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Reduce your TA with muriatic acid and aerate to raise your PH if it drops significantly
What is your CYA as an excessive amount will reduce your...

2 Replies

671 Views

Last post by Denniswiseman
Thu 18 Aug, 2016 08:52
Extremely High Phosphate count
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by Laura » Sun 02 Nov, 2008 14:06

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We have had a problem with phosphates in our pool since June. There was yellow and green alge in the pool at that time. We treated it as per our...

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What are your levels? If your CYA is high it will use a lot of chlorine
30 Replies

131545 Views

Last post by Denniswiseman
Fri 22 Jul, 2016 13:17
low TA high PH...... should I be concerned?

by youngskywalker » Wed 06 Jul, 2016 21:32

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10,000 gal cement plaster pool with Spa spill over. Salt water chlorine generator. Taylor 2006 test kit, plus others.

CH 375
Chlorine 3
Borate 40...

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As I wrote before your CSI is very low and with a plaster/cement pool that means that material may slowly dissolve in that water. If you want to keep...

6 Replies

972 Views

Last post by chem geek
Sun 17 Jul, 2016 01:38
High Alkalinity/Low PH

by kelcal » Tue 14 Jun, 2016 11:20

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Our pool chemistry has been off since we opened the pool - I suspect it was messed up when we closed it too. Our alkalinity is around 200, and the PH...

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See this link .

3 Replies

2862 Views

Last post by chem geek
Thu 16 Jun, 2016 23:47
muriatic acid in India

by memelet » Sun 31 Jan, 2016 03:22

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I'm from the US now living in India. My house here has a fairly large pool (10m x 20m). The pool "experts" here consist of people of who...

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Have you tried searching online for Hydrochloric Acid
Why don't you get some one at home to post a test kit to you

1 Replies

473 Views

Last post by Denniswiseman
Sun 31 Jan, 2016 05:52
Reduce Ph level

by Honey » Sat 23 Jan, 2016 14:49

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How can I reduce my pool water ph level, currently it is almost 8.9.

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You should check the pH a few hours after adding the acid to check how much the pH has been reduced.

3 Replies

522 Views

Last post by Larry
Mon 25 Jan, 2016 02:34

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