Just started opening pool season. We’re shocking pools and adding acid if pH is high. A coworker of mine is sometimes hesitant to add muriatic acid and liquid chlorine at the same time. He says the chlorine will kill the acid and basically waste it. From what I’ve read here, the way acid and chlorine interact together is a key chemical relationship. Am I misunderstanding something? Do you first need some chlorine level readings before introducing other chemicals, or is adding both of these together right after taking off the cover effective? Thanks.