One common chemical that is often used to help lower a pool's pH is muriatic acid, a diluted form of hydrochloric acid. It's a strong acid that can quickly lower pH levels in pool water ...

Instead, firefighters found a crushed container of muriatic acid, a diluted form of hydrochloric acid commonly used for pool maintenance ... muriatic acid causes chemical burns on bare skin ...

It’s not like etching with hydrochloric acid and peroxide is anything new ... But Twitter wouldn’t stand for this chemical heresy, with comments suggesting that the etching process would ...