pH very low after winter

tcjack

Member
May 19, 2013
14
I started checking my chem levels after winter just this weekend and my pH with a pH meter was all the way down to 3.5! Does this sound likely. I have only used trichloro tablets over the winter and I know they reduce pH some but this is quite a drop.
 

Patrick_B

TFP Expert
LifeTime Supporter
Jun 7, 2011
14,999
Midland TX
I would not jump to conclusions on that meter reading, but do you have a test kit? If so, run some tests now, and see where you are. Run pH and TA first. When was the last time you used and calibrated this pH meter?
 

tcjack

Member
May 19, 2013
14
My strips only go down to about 6.5 pH so that won't help. I just bought the meter and calibrated it with buffer solution provided.
 

Patrick_B

TFP Expert
LifeTime Supporter
Jun 7, 2011
14,999
Midland TX
My suggestion is to get a full test kit and get rid of the strips. I really would not wait on this and wouldnt rely on that low pH reading without some verification from a pH drop test and TA drop test.
 

tcjack

Member
May 19, 2013
14
I've put about 50-60 lbs of sodium carbonate and baking soda in and have now got the pH up to about 6.2. Got aways to go. Have to make another trip to the grocery store.

Still a mystery how it got that low however.
 

JamesW

TFP Expert
Mar 2, 2011
13,334
Tabs can definitely cause the ph to get that low. Every pound of trichlor will lower TA by about 2.6 ppm.

Where are your TA and CYA now?

If your TA went red right away, then it was zero, or lower, and the pH was below 4.5.

Assuming a starting TA of 80, it would take about 31 lbs trichlor to get a zero TA. However, you shouldn't have needed that much over the winter.

What was your last know TA and how many pounds of tabs have been used since then?
 

Other Threads of Interest