Best Refractometer For Saltwater Aquarium | Reviews & Recommendations

Truly finding the refractometer for saltwater aquarium is only effective if you can get your hands on some options, which is exactly what we did.

After researching many products, we shaved the list down to the top 10 options today by researching design, capability, durability, features, price, and overall build quality.

We researched hours on these products and compared them to one another to see which one is the best for every need. Read this refractometer for saltwater aquarium article with an extensive buying guide if you're interested in buying or learning about these refractometer for saltwater aquarium.

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1 Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic...

9.5
2 Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent

Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium,...

9.5
3 Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function

Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity...

9.7
4 Salinity Refractometer for Aquarium, Marine Monitoring, Saltwater Testing, Dual Scale Salinity Tester 0-100 PPT& 1.000-1.070 Specific Gravity Saline Seawater Refractometer Hydrometer with ATC

Salinity Refractometer for Aquarium, Marine Monitoring, Saltwater Testing, Dual Scale Salinity...

9.5
5 Digital Salinity Tester for Salt Water - Aquarium Salinity Meter with ATC, IP67 Waterproof, 0-200 PPT Large Range Multi-Parameter Tester for Seawater, Fish Tank, Hydroponics

Digital Salinity Tester for Salt Water - Aquarium Salinity Meter with ATC, IP67 Waterproof, 0-200...

9.5
6 AccuBrate Refractometer Salinity Calibration Fluid – 60 ml Solution to Accurately Calibrate Refractometer for Testing Natural Saltwater or Synthetic Sea Water - Made in the USA (60 ml)

AccuBrate Refractometer Salinity Calibration Fluid – 60 ml Solution to Accurately Calibrate...

9.4
7 AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Hydrometer Specific Gravity Salinity Meter Kit

AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping,...

9.3
8 AquaticHI Aquarium Refractometer w/LED for Saltwater/Brackish/Marine/Reef Tank Testing, Automatic Temperature Control, Salinity 0-100ppt & Specific Gravity 1.000-1.070 (Premium Kit w/LED)

AquaticHI Aquarium Refractometer w/LED for Saltwater/Brackish/Marine/Reef Tank Testing, Automatic...

9.5
9 Seawater Salinity Refractometer,V-Resourcing Automatic Temperature Compensation Sea Water Salinity Measurer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

Seawater Salinity Refractometer,V-Resourcing Automatic Temperature Compensation Sea Water Salinity...

9.8
10 JOR Refractometer, Dual-Range Scale Device to Measure Salinity and Specific Gravity of Saltwater Aquarium and Reef Tank, Provides Accurate Reading, No Batteries Required, 1 Set per Piece

JOR Refractometer, Dual-Range Scale Device to Measure Salinity and Specific Gravity of Saltwater...

9.4

List of best refractometer for saltwater aquarium  Reviews

SaleBestseller No. 1

Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation

  • 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.
Bestseller No. 2

Aquarium Salinity Refractometer with ATC Function,Saltwater Test Kit for Seawater, Pool, Aquarium, Fish Tank.Dual Scale: Specific Gravity & Salt Percent

  • DESIGNED FOR - testing the concentration of saltwater, help you to monitor and control the concentration of salt water.
  • WIDELY USE - Can be used for Aquariums, Marine Monitoring, Agricultural, Gardening & Educational Purposes.
  • EASY , ACCURATE & AFFORDABLE - This refractometer is more accurate and easier to use than traditional hydrometers, more affordable than digital refractometers.
  • DUAL SCALE -- Provides reading of 0-100PPT(parts per thousand ) and corresponding specific gravity range 1.000 to 1.070. You can get the both result at just one test.
  • AUTOMATIC TEMPERTURE COMPENSATION --The build-in Automatic Temperature Compensation feature makes it get consistently accurate reading, no need to control the liquids temperature deliberately, just make sure it's at roomtemperature .
Bestseller No. 3

Aquariums Salinity Refractometer for Seawater Marine Fish-Keeping, Dual Scales Specific Gravity Salinity Meter Hydrometer 0-100ppt & 1.000-1.070, Saltwater Tester with ATC Function

  • Measures on 2 Scales: Aquariums refractometer features Specific Gravity (D 20/20) 1.000-1.070sg and parts per thousand 0-100PPT (1‰=1ppt=1000ppm)
  • Seawater refractometer measures saltwater or salinity of water, ideal for aquarium, marine monitoring, fish-keeping,salty pools&spas and etc.
  • ATC Function: salty water refractometer with automatic temperature compensation, allow you obtain accurate readings easier and faster
  • Salinity Refractometer is made of aluminum body and ABS rubber light and very sturdy, comes with a hard plastic case, a mini screwdriver, a dropper
  • Easy to Use: put 2-3 drops on the saltwater’s prism, towards light then to get the accurate readings through the optic eyepiece, ideal for replacement the poor quality and difficult to read hydrometer refractometer
SaleBestseller No. 4

Salinity Refractometer for Aquarium, Marine Monitoring, Saltwater Testing, Dual Scale Salinity Tester 0-100 PPT& 1.000-1.070 Specific Gravity Saline Seawater Refractometer Hydrometer with ATC

  • DUAL SCALES - Saltwater Refractometer measures on specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100‰, you can get the result in two different units by one test
  • WIDELY USE - The Refractometer designed for Aquariums, Marine Monitoring, Agricultural and Educational Purposes. Help you to control concentration of salt water easily
  • EASY TO USE - Put 2-3 drops of sample solution after calibration on prism, towards light, then get the accurate readings. Aquarium refractometer is ideal for replacement salinity hydrometers or expensive digital salinity tester
  • ATC FUNCTION - Aquarium hydrometer features Automatically Temperature Compensate function and always provide you accurate readings fast
  • DURABLE & PORTABLE - Saline refractometer is made of aluminum and ABS rubber, anti-rust, non-staining and resistant abrasion, sturdy for long time use. Portable refractometer with plastic case easy to carry
SaleBestseller No. 5

Digital Salinity Tester for Salt Water - Aquarium Salinity Meter with ATC, IP67 Waterproof, 0-200 PPT Large Range Multi-Parameter Tester for Seawater, Fish Tank, Hydroponics

  • [Large Salinity Range] Ciztada salinity tester has 2 measurement modes, scale range: 0~9999 ppm/10.0~200 ppt and 0.00-25.00%, which is 2 times than the salinity refractometer
  • [Automatic Temperature Compensation] Notice: We recommend waiting for a while to observe the measurement results for more accurate reading. Ciztada salinity tester is equipped with ATC part inside, during normal temperature, once calibrated, the temperature change would never affect the accurate of your measuring result.
  • [Easy Reading with LCD Backlight] There is no need to worry about seeing the displayed value if the light is insufficient. Ciztada salinity meter features a green backlit LCD to help you see the measurement results clearly in any situation
  • [Multifunctional Salinity tester]: The Ciztada multi-parameter Tester can test Salinity, TDS, EC and Temperature in an accurate, quick and reliable manner for most regular water solutions' testing. Support One-tap switch from salinity to TDS/EC
  • [Wide Applications]: Measures saltwater or salinity of water, ideal for aquarium, marine monitoring, salty pools & spas, koi fish pond, hydroponics and etc
Bestseller No. 6

AccuBrate Refractometer Salinity Calibration Fluid – 60 ml Solution to Accurately Calibrate Refractometer for Testing Natural Saltwater or Synthetic Sea Water - Made in the USA (60 ml)

  • REMARKABLE PERFORMANCE! Accubrate calibration solution is specifically formulated to calibrate refractometers to accurately measure the salinity of saltwater, reef aquariums as well as natural seawater.
  • ACCURATE RESULTS! Our calibration solution is formulated from a high purity blend of salts to produce accurate readings every time. Refractometers must be calibrated often to obtain accurate readings. Note: RO/DI water will not calibrate your refractometer correctly. Always use Accubrate to ensure correct salinity readings - your aquatic friends will love you.
  • EASY TO USE: Our specially designed bottle has a built-in dropper tip which eliminates the need for a pipette. Simply squeeze a few drops of Accubrate directly from the bottle onto the refractometer’s prism slide and you are ready to calibrate your instrument. (Drops come out at a very controllable rate.)
  • LONG-LASTING: You need just 2 to 3 drops of our calibration solution to calibrate a refractometer. Using a few drops means our 60 ml bottle should last a very long time. For best results calibrate refractometer often to ensure accurate readings.
Bestseller No. 7

AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Hydrometer Specific Gravity Salinity Meter Kit

  • 【AUTOUTLET Salinity Refractometer】This salinity tester is used to measure salinity of brine/seawater, monitor and control the concentration of saltwater. Ideal for aquariums and marine applications.
  • 【Measures on 2 Scales】This saltwater hydrometer measures on dual scales: specific gravity and salinity. Ideal for aquariums, marine monitoring, agriculture, gardening and educational purposes.
  • 【Measurement Range】Density of 1.0-1.070 with min scale of 0.001. Concentration of 0-100‰, with min scale of 1‰ (1‰=1PPT=1000PPM, PPT means “parts per thousand”, PPM means “parts per million”)
  • 【With ATC Function】ATC compensation Range (i.e. Built-in Automatic Temperature Compensation System) from 10℃ to 30℃.
  • 【Solid and Lightweight】Salinity meter is made of durable aluminum, which is non-staining, non-corrosive and rustless. Also, it's compact in size with rubberized grip handle, very easy to carry.
Bestseller No. 8

AquaticHI Aquarium Refractometer w/LED for Saltwater/Brackish/Marine/Reef Tank Testing, Automatic Temperature Control, Salinity 0-100ppt & Specific Gravity 1.000-1.070 (Premium Kit w/LED)

  • ⭐️ 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
  • ⭐️ PREMIUM PACKAGE INCLUDES: 1 Refractometer with LED (CR1220 3V battery included) installed on plate prism, 1 spare plate prism (without LED), 1 Hard Carrying Case, 1 Calibrating Screw Driver, 3 Pippet, 1 Cleaning Clothe, 1 Instruction Manual
Bestseller No. 9

Seawater Salinity Refractometer,V-Resourcing Automatic Temperature Compensation Sea Water Salinity Measurer for Aquarium, Hydrometer, 0-100ppt & 1.000-1.070 Salinity Specific Gravity

  • Automatic Temperature Compensation: 10℃~30℃
  • Measuring range: salinity: 0-100 ‰, Specific Gravity : 1.000 to 1.070
  • Minimum scale: salinity: 1 ‰, Specific Gravity : 0.001
  • Resolution: salinity: ±1‰, Specific Gravity : 0.001 mm
  • Perfect for salty water tank and aquarium, seafood water tank, salty pools & spas and etc
Bestseller No. 10

JOR Refractometer, Dual-Range Scale Device to Measure Salinity and Specific Gravity of Saltwater Aquarium and Reef Tank, Provides Accurate Reading, No Batteries Required, 1 Set per Piece

  • Dual-Range Scale Refractometer --- A healthy saltwater aquarium requires a salinity balance or the salt concentration in aquarium water. Refractometer by JOR helps maintain this fundamental parameter in your saltwater aquarium or reef tank, measuring both salt percentage and specific gravity. This measuring tool has a scale range of 0 to 100%, where 1% means one part per thousand (PPT) or 1000 parts per million (PPM) and with a corresponding specific gravity range of 1.000 to 1.070.
  • Provides Accurate Measurement Reading --- Forget guessing and estimating. This handy refractometer features automatic temperature compensation that gives precise, faster and easier readings.
  • Easy To Use --- Place 2 to 3 drops of aquarium water on the glass, then close the plastic cover. Look through the eyepiece as you hold it under a light source. Check the reading. The blue line indicates the exact salinity level.
  • High Quality And Economical --- This premium quality handheld refractometer has an aluminum alloy body, rubber grip, and adjustable focus. It doesn’t corrode, and since it is analog, it can also save you money because it doesn’t need batteries to operate, sparing you from buying replacements.
  • Complete Care Set --- This portable measuring device comes with a hard case for proper storage. It also comes with a cloth so you can wipe the prism plate. The kit also includes essential tools during calibration and testing, such as a suction tube, screwdriver and a user’s manual.
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