SWG lowering PH

[mentallyinert]

So I went on vacation and I assume within a couple of days of returning my flow sensor got chewed through. Chlorine was at .05. No green or visible algae, but I'm sure it's there. I repaired it and set it to super chlorinate until I could pick up some liquid chlorine (sodium hypochlorite 12.5%). I've been putting 3 gallons in my 14,000 gallon above ground and it's going through it in a few hours. The problem I have now is that it is lowering the Ph and has since I installed it this year. I was under the impression it would raise the ph, but I've only had to add ph+ the entire summer. Does this sound right?

To expand on the chlorine, the pool is 92 due to the heatwave. The SWG should be making 2lbs a day on top of the 5 gallons of liquid I put in. Am I just going through a natural process to fix the problem or is something else going on?

Cyanuric acid less than 30
alkalinity 9
ph 7

 

[Rancho Cost-a-Lotta]

Can you post a full set of test results? Which test kit are you using?

 

[mentallyinert]

Can you post a full set of test results? Which test kit are you using?

I amended the original post. Using a 2006-c. Before I left 2 weeks ago the cynauric acid was at 65 and I added just a touch. I just tested it and it never clouded to the point of not seeing the black dot so it's under 30. We haven't had more than .6 of rain over this period. It sat with the solar cover on which I'm guessing destroyed that level? Alkalinity is at 90 and ph is 7

 

[JamesW]

Probably ammonia created by bacteria eating the CYA.

 

[JamesW]

Why Does pH drop When Treating Ammonia With Liquid Chlorine?​

Oxidizing ammonia creates acid by releasing hydrogen.

More than 95% of ammonia is in the form of the ammonium ion (NH4+)

2NH₄⁺ + 3OCl^- --> N₂ + 3H₂O + 2H⁺ +3Cl^-

When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.

10 gallons of 12.5% liquid chlorine added to 25,000 gallons of pool water with ammonia will lower the TA by about 23 ppm or the equivalent of adding 150 ounces of full strength 31.45% muriatic acid.

Every 8.53 gallons of 12.5% liquid chlorine is equivalent to about 1 gallon of 31.45% acid.

Ammonia - Further Reading

www.troublefreepool.com

Further Reading

www.troublefreepool.com

 

[mentallyinert]

Why Does pH drop When Treating Ammonia With Liquid Chlorine?​

Oxidizing ammonia creates acid by releasing hydrogen.

More than 95% of ammonia is in the form of the ammonium ion (NH4+)

2NH₄⁺ + 3OCl^- --> N₂ + 3H₂O + 2H⁺ +3Cl^-

When adding 12.5% sodium hypochlorite (liquid chlorine) to a pool to oxidize ammonia, every gallon of liquid chlorine will create the equivalent of 15 ounces of 31.45% hydrochloric acid.

10 gallons of 12.5% liquid chlorine added to 25,000 gallons of pool water with ammonia will lower the TA by about 23 ppm or the equivalent of adding 150 ounces of full strength 31.45% muriatic acid.

Every 8.53 gallons of 12.5% liquid chlorine is equivalent to about 1 gallon of 31.45% acid.

Ammonia - Further Reading

www.troublefreepool.com

Further Reading

www.troublefreepool.com

Thank you. Do you know what I need to do at this point? Should I add a different liquid chlorine? Should I keep the SWG at 100%

 

[JamesW]

Are you testing CC levels?

 

[JamesW]

SLAM Process

 

[mentallyinert]

SLAM Process

Cc seems to be under .5 and yeah that’s what I thought I was doing but it looks like it’s making the additional problem of ammonia. So am I just still working toward correcting it?

 

[JamesW]

Ammonia - Further Reading

www.troublefreepool.com

 

[mentallyinert]

Ammonia - Further Reading

www.troublefreepool.com

Thanks for the help! I’d like to also thank the soybean industry for making all electrical wire coverings out of material that rodents like to chew on. Probably cost me $2k in repairs in my life

 

[mentallyinert]

Ammonia - Further Reading

www.troublefreepool.com

I can only get the 12.5% and it doesn’t say the amount to raise it to 10ppm and the pool calculator doesn’t list it as an option. Do you know how much I should be adding?

 

[JamesW]

PoolMath

Discover the calculator behind the perfect pool, PoolMath. Dealing with pools has allowed TFP to become the original authors of the best calculator on the net.

www.troublefreepool.com

 

[JamesW]

 

[mentallyinert]

View attachment 517744

I’m sorry, but I can’t seem to find a way to change bleach to sodium hypo chlorite and the app doesn’t have the option

 

[mentallyinert]

View attachment 517744

I’m sorry, but I can’t seem to find a way to change bleach to sodium hypo chlorite and the app doesn’t have the iption. I’m guessing I can just halve it from normal solution?

 

[Rancho Cost-a-Lotta]

Bleach and sodium hypochlorite are the same thing. Just select 12.5% bleach

 

[mentallyinert]

Bleach and sodium hypochlorite are the same thing. Just select 12.5% bleach

I didn’t realize that once you selected bleach you could change the concentration.

So I’ve added 3 gallons of 12.5% twice and it’s not helped. It’s telling me I only need 2.75 gallons of bleach to get the level to 10 but I never got it to test over three once checking an hour after applying

 

[JamesW]

Are you testing CC levels?

What test kit do you have?

What is the pool size?

Are the pH and TA going down as expected for ammonia?

 

[wireform]

At this point it doesn't matter what poolmath says you need. What you need to absolutly do now is raise the FC to 10 and keep it there atleast for ten minutes. So here it goes, put in chlorine wait 10 minutes and test, Then check pool math what you need to add to bring it back to 10 FC. Go it again wait ten minutes and check unill it holds there alittle. At that point you have eraticated the ammonia and need to carry on with a slam and also add back CYA to 30ppm.