Free Chlorine Low After Shocking Pool. All you need to do is to refill the chlorinator feeder with jumbo tablets. Pull the pool tablets from floaters;
For instance, if your ph level is above 7.6, then you’ve wasted half of the chlorine. Even acid rain and other biomatter getting into your pool will cause free chlorine levels to drop. Simply adding chlorine in the form of chlorine tablets, granular chlorine, liquid shock or powder shock will increase the total amount of chlorine within the pool.
Is it safe to swim in a pool with low free chlorine?
You cannot shock a pool now and then. Usually early on and within the first year of ownership. Therefore, it is good to deal with combined chlorine while it is still small. Any chlorine added after this point will form free chlorine (5), because there is no ammonia to react with the chlorine now being added.