[Lazy Ant Brewing]

Getting my grains crushed and equipment ready to brew tomorrow. 

If I were to weigh my water chemical additions --about 3 grams each of gypsum and calcium chloride--and simply dump those in the bottom of my dry brew pot today, would air or moisture cause them to lose their effectiveness by tomorrow about 24 hours from now?

I always sweat the details on stuff I don't know about.

Thanks in advance for your advice.

[denny]

I weigh in advance then wrap in foil til I'm ready to use them.

[mabrungard]

No problem with adding them early. Just be sure to stir them in the water or they may not be fully dissolved.

[bboy9000]

Wouldn't they dissolve when the water is heated or is that too late?

[Indy574]

The Calcium Chloride will liquefy and cause rust spot on equipment if left too long on a metal surface.  Since you taking its mass prior to its change from a solid to a liquid you should be fine. My chemistry is a little weak, since Martin didn't seem concerned then I'm sure your good to go.