What is Sg?
The Specific gravity (Sg) is the measurement used in marine systems to describe the salt content of water. In a marine aquarium the Sg should be between 1.022 – 1.026. We recommend a Sg of 1.024 which most experts agree is an ideal level for most marine fish. The Sg is affected by temperature so the Sg needs to be measured when the water is 24-25C. Sg is easily measured using the Hydrometer provided in the Marine Conversion Kit.
