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Answers given are for informational purposes only and are not meant to replace an exam by an in-person.
I am Dr. Sohaib, a practicing Internal Medicine Specialist and i will do my best to help you today.
That depends upon the quantity sprayed. And the time elapsed since it was sprayed to the time when it will rain and get accumulated in to the pool.
Honestly the concentration of the spray in the pool water would be too low to harm any one but ideally keeping in to consideration the standard precautions, you should discard the first accumulated water in the pool to make absolutely sure that there's nothing wrong with the water and its completely safe for you and your family.
I would have done the same.
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