swimming too soon

It's a chlorine powder sold as a shock. So, it really "depends"... If you only added enough to get you a safe chlorine ratio to the amount of Cynuric Acid (CYA) in your pool, then 30 minutes is probably long enough. If you added enough of this powder to bring your chlorine up to a nuclear level, then I'd imagine you would bleach out your clothes, or cause some kind of rash.

What do your water tests say?

I make it a habit of rinsing off after each swim session regardless of how much chlorine is in the pool. I feel like my skin feels itchy if I don't, but that could just be mental.
 
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