Not necessary! (Unless it's a really good story! )

We've all been there, or someplace similar. But we can instruct you on how to make sure that never happens again. Somebody guided you wrong. CYA and chlorine are only tough if you lack sufficient info. I've used bleach or liquid chlorine for the last 10 or 11 years, and I still use Tri-chlor tabs on occasion (usually the spring), di-chlor powder on occasion, and even Cal-Hypo (but not for a couple of years now).

The KEY is regular testing and knowing what those tests mean.