The Hugo Kamishi Hydrometer / Thermometer is ideal for quick testing of your water’s temperature and also your water’s salinity.
This hydrometer works by being floated into the tank.
The green strip on the Hugo Kamishi Hydrometer is indicative of whether the water salinity is correct or not.
The surface of your jellyfish tank’s water should be level with the green mark to ensure your water is at correct salinity for the safe-keeping of jellyfish.
This hydrometer also doubles up as a traditional thermometer, to ensure you’re keeping on top of water temperature, too.