TA;

[178jc]

testing neighbor water and added 2 drops R007 than 5 drops R008 and the water turned red without adding no R009. What does that mean. PH 6.8 or lower

 

[zea3]

Hi, welcome to TFP! It means your pH is about 4.5 or lower. Depending on what the other test results show, a drain and refill may be needed. Has your neighbor used only trichlor tablets for chlorine? How does the water look?

If the TA test turns immediately red, then that means that the pH is 4.5 or below. Not good. Immediate addition of pH Up / Soda Ash / Arm & Hammer Washing Soda / Sodium Carbonate is required.

For example, if I take 10,000 gallons of normal pool water to start with and I simply add 27 3" (8-ounce) Trichlor pucks/tabs to it and use up the chlorine that is produced (around 148 ppm FC or just a couple of months of typical chlorine usage), then I end up with a pH of 4.06 and a TA of -4.1 which would immediately show red on the TA test. I assumed this low pH would drive out most of the carbon dioxide from the pool. This amount of Trichlor also adds about 90 ppm CYA to the pool so in addition to pH adjustment, a partial drain/refill will likely be desireable as well.

To restore the pH to 7.5 when the TA test immediately shows red, it takes about 128 ounces weight (about 14 cups) of pH Up per 10,000 gallons and much of the TA will be restored as well (assuming most of the carbonates were lost to outgassing). It could take more, depending on how low the pH really is and to be safe one can add less and remeasure. After the pH is balanced, it may be necessary to add some Alkalinity Up / Baking Soda to increase the TA, but that's easy to determine by retesting.

Richard

 

[JamesW]

What test kit do you have?

 

[178jc]

taylor T100 and 1000

 

[JamesW]

Try the test again and use R-0010 to change the color from red to green. See how many drops that takes.

What is the cyanuric acid level?

 

[178jc]

Ok re tested water 2480 Gallons little kids pool. 0 chlorine & 0 CC. ph color was lighter than 6.8, Did TA test 2 drops R-007 than 5 R-008 turned red on first drop. added R-0010 1 drop turned green than 2 drops R-009 turned red again. Borates 0 & CYA 0.

 

[JamesW]

Ok, I would add enough baking soda to increase the TA by 80 and then recheck the pH and TA after a few hours.

Is this a fresh fill?

 

[zea3]

Honestly for such a small pool it may be best to dump the water and refill. Does this pool have a pump and filter?

 

[JamesW]

What is the fill water chemistry?

It might be that the fill water has these numbers if it's from a well.

If the fill water is ok, then I would question the zero cyanuric acid level because the drop in TA is usually due to excessive trichlor usage.

 

[178jc]

yes it is from well. punched numbers in and added chem that it said will see what it says tomorrow night.

 

[JamesW]

Ok, are these the numbers from the fill?