Sera Marin Hydrometer
For the uncomplicated monitoring of marine water density. The salinity (salt contents) can be deduced from the measured density. Since the salinity of marine water in an aquarium must be kept constant, the aquarium water should regularly be checked accordingly. The water to be tested is filled into a sufficiently tall water glass, and the scale of the immersed hydrometer is read off on according to its immersion depth.
Is Discontinued By Manufacturer : No Product Dimensions : 1.18 x 1.38 x 7.48 inches; 1.28 Ounces Item model number : 8910 Date First Available : July 11, 2010 Manufacturer : Sera North America, Inc. ASIN : B003XJCHAQ Country of Origin : China