Having Trouble keeping CL and Lowering PH

[GreenTerrorPool]

New Pool about a month old getting ready to transfer over to my salt system soon. To big issues are i cant seem to keep CL in pool and the PH is always high even after muriatic acid is added. Here is some histroy on my Readings:

FC CC TC PH TA CH CYA
.02 NA NA 8.4 NA NA 28 1/24
11.5 .5 12 8.2 120 300 NA added 1 jug of CL and 1 of Muriatic Acid 1/24
add 3lbs of CYA 1/25
2.5 0 2.5 8.2 120 275 43 1/27
.5 1/30
7.5 0 7.5 8.4 120 300 45 1/31

Any thoughts or suggestions here. Thank you all

I will get good at this....I will get good at this!

 

[triptyx]

Fresh plaster will always cause a heavy pH rise for a while. This is normal - stock up on acid!

The CL drop is a bigger concern. Have you performed an overnight chlorine loss test? Is the water crystal clear (assuming you're past the point where you're still brushing up fresh plaster dust)?

 

[GreenTerrorPool]

i have not done the overnight test...i will search how to do that on this awesome forum

 

[Texas Splash]

Here you go: Pool School - Perform the Overnight FC Loss Test (OCLT). Also remember that those bubblers and waterfall will also increase pH naturally (aeration) so watch the amount of time they are running.

 

[GreenTerrorPool]

yes i have not run the bubbler or waterfall at all for 10 days due to the PH

Ok i just did the FC again...it is at "7" at 9:21 Eastern Time..I will do tommorw morning at appx 7am and will post the results

(On a side note it was at 7.5 at appx 4:30pm so already lost .5)

 

[Jimrahbe]

GTP,

You do realize that FC is consumable. 2 to 4 ppm per day is not unexpected. A little less when it is cold, but that should not be a problem in your location.

Jim R.

 

[GreenTerrorPool]

6:30 am Eastern time report is 6.5 FC so i think i am ok. I guess i just need to keep adding a little bit of chlorine at a time

 

[kimkats]

You ARE good it this! LOL

Here is what I want you to do when you get home today. Use Pool Math to see how much Muratic Acid it would take to get your PH down to 7.8 and add it. Let the pump run for 30 mins or so and retest your PH. IF it is not at 7.8 add some more M. acid. Keep doing this until you see the PH at 7.8. Your PH might be higher than you thought.

The next time you post your numbers can you post them like this please?

FC
CC
PH
TA
CH
CYA

It is easier for these old eyes to see THANKS!

Kim

 

[GreenTerrorPool]

Well I added a whole jug of muriatic acid and it is now 7.0 PH but it will climb

 

[pooldv]

Does your ph test go to 6.8? And is it definitely 7.0 and not 6.8? The pH test can read 7.0 even if the PH is much lower than that. Same for the high end of the scale. PH below 7.0 is very corrosive and can cause damage. I would be inclined to aerate a bit to speed the pH rise and get it up to 7.2. What did PoolMath say a whole jug would take the pH down to?

 

[GreenTerrorPool]

Great Point PoolDV. Yes the PH was 7. I use the K1000 test to range of test is 6.8 to 8.2. i just started the waterfalls

 

[GreenTerrorPool]

pool math said to add 40oz of muriatic acid and i added a whole gallon (128 oz) so I def. goofed there. but with the new plaster it will rise. but lesson learned. I will check again the PH in a bit.

 

[YippeeSkippy]

GreenTerrorPool, even when your pH is on the high side you need to run your water features daily for a short period so that you aren't letting stagnant water sit in those pipes. You want to expose all the pipes to some chlorine daily.

Yip