This Aquarium Sea Marine Seawater Hydrometer is a must-have for each fish-keeping enthusiast. As long as you own this ocean hydrometer, you can quickly, easily, and accurately measure the salinity and specific gravity of your aquarium. With a wide range of measurements, it can be accurate to three decimal places. Easy to read and simple to operate, it is your cost-effective choice. A reasonable price is suitable for each wise consumer who cares about quality. Made of excellent material, it is durable and reliable for your long-term use. It is a real bargain! Features Fill the hydrometer with water to make sure no bubbles attach to the floating needle. Place the hydrometer on a flat surface. Measure the reading on the hydrometer.
The correct reading should be 1.021-1.023Takes a true water sample at 6″ depth. Avoids inaccurate surface samples automatically takes correct sample size by leveling off at top of damp readings can be taken inside or outside aquariumHands stay dry, thus avoiding contamination
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