Aquatopia Floating Hydrometer & Thermometer

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The hydrometer function will test the salinity levels in marine aquariums and the thermometer will test the temperature of the water. This Hydrometer/Thermometer is easy to read an d use. Green color indicates both ideal temperature and salinity. Hydrometer measures specific gravity: 1.000---1.060 Temperature in °F (40-120) and °C.(0-50) Ideal water parameters: Marine 22-26C Salinity 1.020-1.024 Show more