Hirao Scale Manufacturer Saltwater Fish Baume Meter (for Ornamental Fish) Saltwater Specific Gravity Meter

Seawater Hydrometer
Hirao Keiryoki Baume Meter for Saltwater Fish (for Ornamental Fish)

New, unopened product.
Ships from Osaka with free shipping.
No price reductions for single item purchases, so please refrain from negotiation.
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●How to Use
Gently pinch the top of the hydrometer, lower it quietly into the aquarium water without trapping air bubbles, let it float, and after it stabilizes, submerge it by about 2 scale marks and then release your hand.
After the hydrometer stabilizes again, read the value.
Repeat this measurement 2-3 times and use the average value as the specific gravity of the aquarium water.
When reading the hydrometer's value, read it at the scale mark on the water surface.

●Precautions for Use
This product is made of very thin glass, so please handle it with care.
If the main body is contaminated with oil or other substances, accurate readings cannot be obtained, so wash it thoroughly before use.
Float it gently to avoid trapping air bubbles. Inaccurate readings will result if air bubbles are present.
When preparing seawater with artificial sea salt, measure after it has fully dissolved.
Confirm that the hydrometer is not touching the sides or bottom of the tank before measuring.
Manufactured at a standard temperature of 25°C.