I am also afraid of muriatic acid. Each time I read about it and the required precautions it make me scared. More than that, I don’t understand how people store it safely. How are you doing this seriously? It can’t be stored inside. Outside yes, but not under the sun, far from metals, equipments or anything you care about.
That said, I would like to use muriatic acid as many recommend here but I don’t see how.
I always use dry acid each week or when required to lower ph. What will happen? What the sulfates will do exactly? For what is it harmful? For the people or the pool itself?