Features:

  • For Salt Water / Marine Aquariums.Easy to use.Measure both Temperature and Specific Gravity of the water.
  • Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums.Instruction:Place the hydrometer into water, and let it flow freely in the water.
  • If water level below the green indicator means more fresh water is required.If water level above the green indicator means more salt water is required.
  • Material: Glass
  • Size: 20cm/7.87"