For determining the specific gravity in saltwater aquaria
The salt content in saltwater is usually measured as specific gravity (also sometimes called relative density) and is one of the most important water parameters. Many tank inhabitants are sensitive to even minor changes of the water conditions. These should therefore be kept as constant as possible in the optimum range for each tank.
The specific gravity of natural seawater of 35 ‰ (psu) is 1.026 – compared to water measured at 25 °C / 77 °F. Our recommendation for aquarium water at 25 °C / 77 °F is 1.025 - 1.027 (depending on the tank type). For an exact, reliable measure of the specific gravity, we recommend to use the Tropic Marin® HIGH-PRECISION HYDROMETER.
• Aquarium Hydrometer/Thermometer.
• ACCURACY 0.002
The salt content in saltwater is usually measured as specific gravity (also sometimes called relative density) and is one of the most important water parameters. Many tank inhabitants are sensitive to even minor changes of the water conditions. These should therefore be kept as constant as possible in the optimum range for each tank.
The specific gravity of natural seawater of 35 ‰ (psu) is 1.026 – compared to water measured at 25 °C / 77 °F. Our recommendation for aquarium water at 25 °C / 77 °F is 1.025 - 1.027 (depending on the tank type). For an exact, reliable measure of the specific gravity, we recommend to use the Tropic Marin® HIGH-PRECISION HYDROMETER.
• Aquarium Hydrometer/Thermometer.
• ACCURACY 0.002