Please note that the product information displayed is provided by manufacturers, suppliers and other third parties and is not independently verified by Petco.
No matter the size of your aquarium, Instant Ocean sea salts and water care products offer the smartest, easiest way to bring the ocean home. Accurate, reliable water test equipment is a vital part of maintaining a healthy, successful marine aquarium. Easy to read and operate, Instant Ocean Hydrometer delivers precise, full-range salinity and specific gravity readings. Ideal for use in water temperatures of 68 degrees to 85 degrees, the Hydrometer provides easy-fill convenience - no wet hands. With an extra-wide stabilizer base, this easy-read tool has a two-color scale with a safe zone for simple results. To use, dunk the hydrometer in your aquarium to fill with water. Dislodge air bubbles by tapping gently. Place the tool on a level surface to read specific gravity. For most marine aquariums, recommended specific gravity is 1.02 to 1.026.