Easy-to-use swing-arm style hydrometer for brackish and marine systems
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Precise full range salinity and specific gravity readings
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Large easy-to-read pointer and wide stabilizer base
Instant Ocean's durable, clear acrylic, swing-arm hydrometer is easy to use and easy to read. Full-range results in both salinity and specific gravity (0 to 40 ppt salinity and 1.000 to 1.030 specific gravity) with color-blocked "safe zone" to make routine testing quick and accurate. Features large swing-arm pointer, extra-wide stable base and "easy-dip" design to keep your hands dry while obtaining water sample. Temperature-corrected for use between 68° and 85°F with specific gravity readings accurate to ± 0.001.
Please click on "More Information" for instructions, care and ideal saltwater aquarium parameters.
Instructions:
Before use, condition hydrometer by soaking it in saltwater for 24 hours.
Step 1 - Slowly fill the Instant Ocean Hydrometer by dipping bottom corner fill port below water surface until water flows up and over inner weir.
Step 2 - Dislodge air bubbles by gently tapping hydrometer or pointer. Air bubbles on the pointer may result in inaccurate results.
Step 3 - Place the hydrometer on a level surface and read specific gravity (inside scale) and salinity (outside scale).
Care:
Rinse thoroughly in freshwater after each use to prevent mineral/salt buildup which can affect accuracy. Salt and calcium deposits that accumulate on the pointer will result in incorrect results. If crystallization occurs inside the unit, soak in lukewarm water or vinegar for 30-minutes, rinse with freshwater and air dry.
Parameter
Suggested Level: Reef Aquarium
Suggested Level: FOWLR Aquarium
Average Level: Coral Reefs
Specific Gravity
1.023 - 1.025
1.020 - 1.025
1.025
Temperature
72 - 78°F
72 - 78°F
82°F
pH
8.1 - 8.4
8.1 - 8.4
8.0 - 8.5
Alkalinity
8 - 12 dKH
8 - 12 dKH
6 - 8 dKH
Ammonia (NH3)
Undetectable
Undetectable
Near Zero
Nitrite (NO2)
Undetectable
Undetectable
Near Zero
Nitrate - Nitrogen (NO3)
< 1.0 ppm
< 30 ppm
0.25 ppm
Phosphate (PO4)
< 0.2 ppm
< 1.0 ppm
0.13 ppm
Calcium
350 - 450 ppm
350 - 450 ppm
380 - 420 ppm
Magnesium
1250 - 1350 ppm
1150 - 1350 ppm
1300 ppm
Iodine
0.06 - 0.10 ppm
0.04 - 0.10 ppm
0.06 ppm
Strontium
8 - 14 ppm
4 - 10 ppm
8 - 10 ppm
Testimonial By:
Testimonial:
Balik Raleigh, NC
Excellent product. Very easy to use and maintain. Highly recommended.
This is a great and easy to use hydrometer. I am a beginner at saltwater aquariums, and this has helped me a ton. I wouldn't trust anything else but marine land!
The Instant Ocean Hydrometer is an essential part of any saltwater aquarium. We have one in our salt mixing area and for each of our saltwater aquariums. If you have multiple aquariums, get one for each aquarium. Then you'll always have a hydrometer neraby for convenient testing. For professional results use a refractomer.
Testing your water parameters is an important method of foreseeing problems in your aquatic ecosystem before they result in catastrophe. Luckily, tools that were once only accessible (and affordable) to advanced hobbyists have since become simpler.
Specific gravity measures the relative salinity (amount of dissolved salts) in your aquarium water in comparison to pure water. Measuring specific gravity on a regular basis is crucial to maintain the ideal environment for your marine inhabitants.
Create the perfect saltwater mixing container to have available for emergency water replacements as well as your regular water changes. We explain how.
Don't take the quality of your tap water for granted. If you draw your water from a well, nature may not be providing you the perfect balance. If you are using tap water from your municipal department, it likely includes minerals and additives.
 "Instant Ocean Hydrometer")
Instant Ocean's durable, clear acrylic, swing-arm hydrometer is easy to use and easy to read. Full-range results in both salinity and specific gravity (0 to 40 ppt salinity and 1.000 to 1.030 specific gravity) with color-blocked "safe zone" to make routine testing quick and accurate. Features large swing-arm pointer, extra-wide stable base and "easy-dip" design to keep your hands dry while obtaining water sample. Temperature-corrected for use between 68° and 85°F with specific gravity readings accurate to ± 0.001.
