Aquarium Systems Instant Ocean Hydrometer

Full range scale features easy to read markings with safe zone clearly indicated.

No-wet-hands-design.

Accurate to +/- 0.001.

Ideal for use in water temperatures from 68° to 85°F.

Instructions For Use

1. Rinse hydrometer with fresh water before using.
2. Slowly fill hydrometer by dipping bottom corner fill port below water surface until water flows up and over inner weir.
3. Dislodge air bubbles by tapping hydrometer, or pointer, gently with pencil.
4. Placing hydrometer on a level surface, read specific gravity (inside scale) and salinity (outside scale). For most marine aquariums, recommended specific gravity is 1.020 to 1.024.