Rain Water Affect

[STXSunLizard]

How does rain affect chemical levels recommended by TFP?

 

[mknauss]

Welcome to the forum!
Generally, the volume of rain is not sufficient to effect the pool chemistry appreciably.
Now if you get a Tropical Storm or other high rain volume event, then overflow or exchange of pool water with rain water can have an effect.
I suggest you read through Pool Care Basics - Trouble Free Pool and even look at a few of our videos TFP-TV - Trouble Free Pool

 

[JJ_Tex]

You logs look good and you are keeping your FC at or above the target. That will ensure you have enough buffer to handle whatever life throws at your pool, even a little rain.

 

[ajw22]

How does rain affect chemical levels recommended by TFP?

Welcome to TFP.

Rainwater is the proverbial drop in the bucket. The volume of rain is rarely significant enough to change your chemical levels outside of TFP ranges.

Now, I'm not sure what you're asking. The chemical levels recommended by TFP do not change whether it's raining or sunny.

Rainwater has a pH of 5.0 to 5.5 and a TA of 0. So, if rain has any dilution effect on water chemistry, it will slightly lower pH and TA. If a large storm causes your pool to overflow and lose water, your CYA, CH, and salt levels can decrease.

Rainwater can stratify on the top of the pool water if your pump is not running. So run your pump and circulate your pool for a while before you test after rain.

Test your chemical levels after any big storm and adjust your levels as necessary back to the TFP recommended ranges.

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