to add de or not to add de

[mikemedic]

Ok, off to buy more bleach
My question was
DO I add in the 90 degree heat today to get it to 25 ppm or wait till tonight , test the free cl and add according
Makes me antsy cause my pool is usually pristine clean
Mike

[duraleigh]

Either way in your case. The Sun always burns up some Cl...less in your case because of the CYA of 90.

That said, I am such a cheapskate, I add my Cl in the evening to get the most bang for my buck.

As a learning tool, go ahead and put it in ASAP. Then, test your Cl at dusk this evening. See what you've lost during the day and add enough to get right back to 25.

Next, get up early tomorrow AM (watch out for those adult beverages during this Memorial Day ) and test your Cl again......comparing your daytime loss to your nighttime loss. In your case, it may not be that much difference.

Keep us posted.