A pool can look perfect on Friday, then turn an eerie green tint right after you shock it and suddenly everyone swears it’s algae. We’ve seen it on routes and heard it from homeowners: clear walls, no visible growth, but the water has a strange color cast that shows up fast. The fix starts with stopping the guesswork and running a simple, chemistry-driven test that tells you what you’re actually fighting. We’re joined by Joe Laurino of Culator Products to unpack the real causes o...