Calcium Chloride for RH control

Has anyone used this for humidity control in their tent or grow room? As my autos begin to transition to flower I want to get RH down about 10%-15%.
I currently have a small dehum inside my 3x3x6 tent which extracts about 1 cup/24hrs, but I still have RH of about 60%.
My tent is in a small room in my basement and I wonder about using the CC in the room but not the tent.
Any takers?

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I have no clue. We don’t have basements where I live due to the water table less than 8 feet down.

Maybe beed a bigger dehumidifier for thr air outside the tent.

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@MrPeat thanks.

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