Coralife Deep Six Hydrometer

The newly redesigned Coralife Deep Six Hydrometer delivers precise, reliable measurements of your aquarium’s salinity and specific gravity. Its improved calibration and integrated bubble diffuser ensure consistently accurate readings every time. The built-in base allows the hydrometer to stand securely on any flat surface for easy, hands-free testing, making it the perfect tool for maintaining a healthy marine or reef aquarium environment.