1. [STURDY CONSTRUCTION] Crafted with quality plastic for durability and reliability.
2. [INSTANT RESULTS] Get quick and accurate readings without any manual calculations.
3. [ TESTER] Measures specific gravity and salinity, covering a wide range of water conditions.
4. [OPTIMAL SAFETY] Ensures seawater in seafood pools stays within the safety line for marine life protection.
5. [NO-FAIL ACCURACY] Prevents salt crystallization for consistently precise measurements.

Spec:
Item Type: Aquarium Salinity Tester
Material: Plastic
Application: Aquarium Seawater Concentration Meter
Specific Gravity Range: 1.000-1.030
Salinity Range: 0-40
Applicable Temperature: 20-30℃ / 68-86℉

How to Use:
1. Insert the hydrometer to 15cm (5.9in) below the water surface of the water tank or fish pond until the water overflows the baffle (slowly fill with water to prevent the upper air bubbles from adhering to the pointer).
2. When the water is full (level with the top of the baffle), take out the hydrometer and place it on a level surface.
3. Air bubbles adhering to the pointer will cause inaccurate readings. Carefully tap the hydrometer to shake out the adhering air bubbles.
4. Read the specific gravity according to the inner scale, and read the salinity (PPT) according to the outer scale. It is recommended that the specific gravity of the seawater in the seafood pool is between 1.020‑1.023, that is, within the safety line.
5. Rinse with water after each use.

packing list:
1 x Aquarium Salinity Tester
1 x Plastic Rod

Notice:
Before using the hydrometer for the first time, fill it with warm water and detergent to clean the surface inside, which can be more accurate.