Popular Aquarium Hydrometers of December 2020

November 20, 2020 By Jayne Washington

We present you a rating of 10 popular Aquarium Hydrometers of December 2020 with technical characteristics, customer reviews, and video reviews.

9.5
Coralife Energy Savers ACLAF877 Deep Six Hydrometer

Approx. price: $9.1.

Key Features:

  • The Deep Six Hydrometer is calibrated and tested for accuracy using advanced testing procedures. With its durable construction and easy-to-read scales, the deep six is to provide years of reliable performance.
  • Cora life is one of the markets leading manufacturers of premium aquarium products
  • Cora life's Hydrometer takes a true water sample at six inch depth
  • Easy to read and accurate, this specific gravity meter is designed to give temperature-corrected readings in warm water aquariums
  • Coralife is one of the market’s leading manufacturers of premium aquarium products
  • Coralife's Hydrometer takes a true water sample at six inch depth
2
Best Value of Money

Full Range Hydrometer

INSTANT OCEAN-AQUARIUM SYSTEMS

9.2
Full Range Hydrometer

Approx. price: $13. You may saved up to 4%.

Key Features:

  • No-wet-hands-design
8.7
Dr. Marine Glass Saltwater Hydrometer Thermometer Reef Soft Coral

Approx. price: $9.2.

Key Features:

  • Ensures proper gravity of aquarium water. Easy to use.
  • Ensures all water has the same salinity within aquarium
  • Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums.
  • Measure both Temperature and Specific Gravity of the water.
  • SIZE:19.2CM(7.5"). Glass Hydrometer; Measures Celsius and Fahrenheit
8.3
Boxtech Aquarium Marine Test Sea Saltwater Hydrometer Reef - Ocean Hydrometer Salinity Meter - for Fish Tank Water Salinity Specific Gravity Test

Approx. price: $11.

Key Features:

  • Safe Material:Made of plastic,aquarium clear Automatic Accurate Readable SaltWater Hydrometer.
  • Durable Clear Acrylic:Accurate, durable, and easy to read your marine aquarium's salt level and specific gravity,Small and waterproof.if the specific gravity between 1.000 - 1.019,show that the specific gravity is small;if the specific gravity between 1.020 - 1.023,show that the specific gravity is nomal;if the specific gravity between 1.024 - 1.030,show that the specific gravity is big;
  • Clearly Safe Zone Indicated:Includes solinity and specific grovity scales.The outside rang of scale indicates salinity(PPT).The inside range of scale indicates gravity.And with safe zone clearly indicated.Range of use: 0-40 degrees (1.000-1.030).If the salinity ppt between 32 - 40,show that the salinity hydrometer is high;If the salinity ppt between 27 - 31,show that the salinity hydrometer is normal; If the salinity ppt between 0 - 26,show that the salinity hydrometer is light.
  • Wide Usage:Fit for brackish and marine aquariums.Perfect for testing both salinity and specific gravity of your brackish and marine tank.Includes solinity and specific grovity scales.Suitable for fresh water and sea water.
  • Easy to Read and Use:The easy-to-read swing-arm pointer and extra wide stable base provide an accurate test result.
5
Biggest Bang For Your Buck

Instant Ocean SeaTest Hydrometer

Instant Ocean

8
Instant Ocean SeaTest Hydrometer

Approx. price: $14.

Key Features:

  • Marine hydrometer: Tests salinity and specific gravity in marine aquariums to help maintain a healthy tank
  • Accurate: Precise, full-range readings - accurate to +/- 0
  • Ready to use: Simply dunk in aquarium to fill with water, then set on level surface to read
  • Easy to read: Clearly marked to show results
  • Extra-wide stabilizer base: Two-color scale with a safe zone for simple results
7.9
AUTOUTLET Salinity Refractometer,Automatic Temperature Compensation Salt Water Tester Hydrometer 0-100ppt & 1.000-1.070 Specific Gravity ATC Refractometer for Sea Water Aquarium Tank, Marine Industry

Approx. price: $20.

Key Features:

  • 【Salinity Refractometer】Measure Salt Water or Salinity of Water,Monitor and Control the Concentration of Salt Water and Brine,Ideal for Aquariums and Marine Applications.
  • 【Measures on 2 Scales】Specific Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult to read hydrometer.
  • 【Density Measurement Range】1.0-1.070, Minimum Scale is 0.001.
  • 【Concentration Measurement Range】0-100‰, Minimum Scale is 1‰.
  • 【ATC】Automatic Temperature Compensation, 0-10°C.
7.9
Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

Approx. price: $22.

Key Features:

  • Measure salt water or salinity of water, ideal for aquariums and marine monitoring.
  • Measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand.
  • Features automatic temperature compensation.
  • Comes with hard case, dropper, screwdriver, user manual and cleaning cloth.
  • The main part is made of chromium, it's very durable.
7.4
capetsma Salinity Tester, Accurate Sea Hydrometer Aquarium Marine Salinity Meter for Fish Tank Pond Water Saltwater Freshwater Specific Gravity Test

Approx. price: $9.9.

Key Features:

  • Safe Material & Unique Design: Made of durable Acrylic, this Fish Tank Test Kit salinity Hydrometer is designed with an automatic level function.
  • Quickly, easily, and accurately measurement: With this hydrometer saltwater aquarium test kit, you can test your marine aquarium's salt level and specific gravity, and It is optimum to be put into below 6" deep water to avoid the error caused by the oil film on the water.
  • Higher Accuracy & safe zone indicated: Readings are temperature-corrected & accurate to +/- 0. 001. specific gravity units ranges from 1. 000 - 1. 030 with a safe zone of 1.020-1.023. The outside range of scale indicates salinity ppt, ranges from 0-40, safe zone is 27-31.
  • Easy to Read & Clean: The easy-to-read swing-arm pointer and extra wide stable base provide an accurate test result. After use, soak this saltwater meter in mild acid(vinegar) for 30 minutes, rinse with tap water and air dry. Do not disassemble.
  • Wide Usage:Fit for brackish and reef salt marine aquariums. Perfect for testing both salinity and specific gravity of your brackish and marine tank.Includes salinity and specific gravity scales.Suitable for fresh water and sea water.
7.4
AquaticHI Aquarium Refractometer for Saltwater/Brackish/Marine/Reef Tank Testing, Automatic Temperature Control, Salinity (0-100ppt) and Specific Gravity (1.000-1.070) (Standard Kit)

Approx. price: $24. You may saved up to 28%.

Key Features:

  • ⭐️ DUAL SCALE REFRACTOMETER: Measures in Salinity 0 - 100ppt and Specific Gravity 1.000 - 1.070
  • ⭐️ IDEAL APPLICATIONS: Aquariums, Marine Monitoring, Agricultural, Gardening & Educational Purposes (Biology Projects)
  • ⭐️ AUTOMATIC TEMPERATURE COMPENSATION (ATC): Automated to provide accurate measurements even with temperature fluctuations
  • ⭐️ AFFORDABLE high quality while providing ⭐️ PROFESSIONAL testing equipment standards, accurate even at low salt levels
  • ⭐️ STANDARD PACKAGE INCLUDES: 1 Refractometer, 1 Hard Carrying Case, 1 Calibrating Screw Driver, 1 Pippet, 1 Cleaning Clothe, 1 Instruction Manual
7.3
Salinity Refractometer for Aquariums, Seawater, Marine Fish-keeping, Saltwater Testing, Dual Scale Salinity Meter Specific Gravity 0-100ppt & 1.000-1.070, Professional ATC Salinity Water Tester Kit

Approx. price: $19.

Key Features:

  • Easy To Use: The salinity refractometer is easy to operate, after calibration, just 2 to 3 drops, than get the accurate readings, to replace your poor quality refractometer and difficult to read hydrometer
  • Dual Scales: Salinity Refractometer density specific gravity (D 20/20) parts per thousand 1.000-1.070SG, minimum scale is 0.001, concentration measurement range w/w 0-100‰, resolution 1‰
  • Salinity Tester Meter: Measuring salt water or salinity of water, ideal for aquarium, seawater, marine fishkeeping, sea-fish tanks, salty pools & spas and etc
  • Automatic Temperature Compensation: The saltwater tester can automatic compensate temp when ambient temperature changes, you can obtain accurate readings easier and faster.
  • Durable& Portable: Salinity Meter is made of aluminum body and ABS rubber outside, resistant to abrasion and corrosion. Plastic box and sponge covered to make the refractometer safe. Any problem you met and please don't hesitate to contact us.

How to Use a Hydrometer for Fish Tanks

QPExperts.com is a participant in the Amazon Services LLC Associates Program and eBay Partner Network, and we get a commission on purchases made through our links.