Water Chemistry Issues after Heavy Rain.

[martinezj1120]

HI everyone,

I have been pretty on top of my water chemistry with this help of this forum and pool math. I do a full range of test once a week and check my PH and CL probably every other day. So far so good as the pool looks and feels great! We have been out of town the past two days and received some pretty heavy rains last night. Want to get the pool ready for today and decided to do a full test.

FC 7
PH 8.2
TA 100
CYA 30
Salt 3400

Only owned a pool for 2 seasons now but my #'s have never been this far off, especially my PH and TA, even my CYA has dropped some. Plugging all these #'s into pool math has me feeling a little overwhelmed. What is the best way to tackle my #s to get them back in line. Which one do I tackle first? I would assume PH and TA, as my ideal PH is around a 7.4-7.6 and TA is usually around a 70-80. Any advice is appreciated. Thank you!

BTW, water looks fine but nervous about the kids jumping in with my #s like this.

 

[Richard320]

Your TA should not have risen from the rain. Rain water should be pretty close to distilled water.

pH will rise from aeration of the raindrops n the surface.

Salt, CYA, and CH should all have gone done by roughly the same percentages as, again, rainwater should be pretty close to distilled water. And whatever percentage they dropped, your TA should have dropped about the same.

Adjust the pH and let the kids in fifteen minutes later. You can mess with CYA and salt with them in the pool. 7 FC is well below SLAM level for 30 CYA.

 

[martinezj1120]

Your TA should not have risen from the rain. Rain water should be pretty close to distilled water.

pH will rise from aeration of the raindrops n the surface.

Salt, CYA, and CH should all have gone done by roughly the same percentages as, again, rainwater should be pretty close to distilled water. And whatever percentage they dropped, your TA should have dropped about the same.

Adjust the pH and let the kids in fifteen minutes later. You can mess with CYA and salt with them in the pool. 7 FC is well below SLAM level for 30 CYA.

Thanks. I added dry acid to drop my PH and I will see what happens.

 

[mknauss]

I added dry acid

As you have a SWCG, it is not advised to use dry acid. The sulfates will build up in your pool water and can slowly destroy metals, aka your SWCG. Use muriatic acid instead.