Aquarium Systems SeaTest Hydrometer |
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 SeaTest's durable, clear acrylic, swing-arm style hydrometer is easy to use and easy to read. The temperature corrected scales are intended primarily for use between 68° and 85° F and display readings for both specific gravity and salinity. It is designed to measure a wide range of specific gravity from 1.000 to 1.030 and salinity from 0 to 40 parts per thousand. |
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