Floating Hydrometer – Salinity Tester for Lobster Tanks and Seafood Display Systems

A floating hydrometer provides a quick and reliable way to measure salinity in lobster tanks and seafood display systems.
Maintaining correct salinity is critical for lobster health. If salinity is too low or too high, lobsters become stressed and water conditions can deteriorate quickly.

Lobster tanks typically operate between:
1.020–1.025 specific gravity
In real-world service work, this is used when:
• adjusting saltwater mixes
• troubleshooting stressed lobsters
• confirming proper system setup
It is one of the most basic and essential tools in lobster and seafood display tank maintenance.

Take a sample of tank water and place the hydrometer in the sample.
Read the waterline against the scale to determine salinity.

Never add dry salt directly to a tank with lobsters.
Always mix salt completely before adding to the system.
Retest after any salinity adjustment.