Low TA and PH

[Geojaneo]

Need help with the TA and PH

This a.m. readings

TC: 5
CYA 60 (added stabilzer to bring to 75)
TA 50
PH 6.8
Water temp: 87

Opened pool 5/11 and TA was 100 and PH in normal range 7.2 - 7.5. Slammed using Pool Math. Then went way two weeks within a month and SWG set too
high so turned off SWG and allowed to drift down and yesterday started running the SWG at 20%. I've read Pool School and did the calculations in Pool Math, but am still confused as to what to address first. In three years never had a PH/TA issue. Purchased an accessory to help aerate the pool. Pool has had very little use in the month it's been open.

Suggestions as to the best option - Super Washing Soda/Borax/Baking Soda - read that it should be done in small increments!

Many thanks!

 

[mknauss]

Add enough baking soda to raise your TA to 70. Continue to aerate.

TA does not drop on its own. A lot of rain with overflow could lower it a bit, but normally you need to add acid to lower TA.

 

[ajw22]

Aerate your pool to bring the PH up.

A SWG will naturally do aeration. You lost your normal PH boost when you turned off your SWG.

Leave your TA alone for the moment and see if it drifts up and if your PH stays stable.

What is the PH and TA of your fill water?

 

[Geojaneo]

Have not used any fill water but PH is 7.4 - have not tested TA. Had several inches a of rain over the past month and had to release a few times.

Thanks for quick reply!

- - - Updated - - -

Thanks! I neglected to mention several inches of rain last month and had to release water! Appreciate the guidance!

 

[Geojaneo]

Thanks so much! I replied twice to AJW and my second comment was meant for you!

 

[mknauss]

Inches of rain is not sufficient to drop TA by 50%. Be sure you do not have a testing error.

Take care.