Chlorine is not very friendly to 304 and 303 Stainless Steel (some of your rigging parts are probably of this material)...however, the dilution rate even in a 'shocked' pool is probably not enough to cause a problem. We build machinery for most major retail chlorine manufacturers and occasionally get some stainless mixed up (there is a higher grade of stainless that resists chlorine). The result is that the inferior stainless part quickly rusts.