FinWhale keeps tabs on pool chlorine—and corrects it as needed

San Francisco Bay Area-based SunnyWhale brought an early version of its inaugural product to CES 2026, a new pool water quality measurement and chemical dispensing system called FinWhale. The device is named after the fin whale, the largest filter-feeding animal in the ocean, which inspired the system.

FinWhale is a self-contained, floating device about size of a gallon milk jug. Bobbing in the pool, the device measures water temperature, free chlorine (FC), and pH, tracking data over time and logging it in its mobile app.