Send us Fan Mail Andrea is back. Alone. Unsupervised. And apparently powered by battery backups and unresolved rage toward misinformation. In this episode of Andrea Unfiltered, she dives headfirst into pool chemistry fundamentals—except instead of reading you a boring textbook, she drags bad pool advice into the street and fights it like it owes her money. This is Part One of her “Cool Chemicals” series (yes, she named it herself, and yes, she’s proud of it). Expect a crash course in sanitize...