Editor's Choice - Our Favorite Aquarium Equip Aquarium Hydrometers

1. Aquarium Equip UP Glass Saltwater Hydrometer - Reef Soft Coral Salinity Marine Fish Shrimp sea

User Ratings: 55 17

Aquarium Equip D667 UP??????? First Impressions

"No assembly required."

Hate the batteries, but once loaded, it seems to work fine. And it is much more accurate than my old salinity meter. Be sure to buy the calibration solution and test this before use! My only criticism would be that it's a little too dark. It is a little cheaper made but it works great for the cost! It works, we'll i assume it does as i have nothing to compare it to. I was surprise that the product was really cheap compare to the other ones.

  • Aquarium Equip UP Glass Saltwater Hydrometer - Reef Soft Coral Salinity Marine Fish Shrimp sea
  • 1. Easy to use 2. Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums 3. Hydrometer measures specific gravity 4. Need it for raising brine shrimp
  • Manufacture: D667 UP玻璃海水比重計
  • Product Dimensions: 0.8 x 0.8 x 6.2 inches; 0.3 Ounces
  • Editor's Impressions Of The Aquarium Equip D667 UP???????
  • Accuracy [star rating='3.6']
  • Quality [star rating='3.6']
  • Value For Money [star rating='4']
  • Affordability [star rating='4.1']

Aquarium Equip D667 UP??????? Final Thoughts

"No assembly required."

I tried it over and over and no bubbles! Easy to use, easy to clean, easy to read. I did NOT calibrate, but am getting accurate readings. Small problem with bubbles on the needle but other than that no issues. Find a good light source to make reading easier. It's a basic but reliable refractomer I use it for my aquariums. This refractor should last a good number of years.

Overall Score
3.8

[star rating="3.8"]
(8 Points)

Peoples Choice - Other Highly Rated Aquarium Equip Aquarium Hydrometers

2. Dr. Marine Saltwater Marine Aquarium Salinity Portable Refractometer Meter ATC 0~10% reef

Aquarium Equip D-803 UP鹽度檢測器 First Impressions

"Great Product, Thanks!"

I bought this and a hydrometer because of the reviews saying its not accurate. Great product I used for beer making and my saltwater aquarium. Bought this one to check my old one, this one checked right on the dot at 1. I needed this product and it is a lot less expensive than the local aquarium store. Simple to use, but if there are any air bubbles the results will be way off. I have purchased before will buy again! Don't spend your money on calibration solution.

  • Dr. Marine Saltwater Marine Aquarium Salinity Portable Refractometer Meter ATC 0~10% reef
  • This latest salinity refractometer is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and concentration (Parts per Thousand) of salt in water.
  • Manufacture: UP AQUA
  • Editor's Impressions Of The Aquarium Equip D-803 UP鹽度檢測器
  • Accuracy [star rating='4.1']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.2']

Aquarium Equip D-803 UP鹽度檢測器 Final Thoughts

"Good product."

Now that it's calibrated I love it! On the shaft of the refractometer, there's a little, rubber-covered nub. Get precise salinity readings in moments. I bought this and a hydrometer because of the reviews saying its not accurate. Get precise salinity readings in moments. Comes with a nice carrying case for easy and secure transportation. Not sure how accurate it is, but it's a good reference point.

Overall Score
5.0

[star rating="5"]
(1 Points)

3. UEETEK Heavy Duty Submersible Pump for Aquarium,Powerhead Fountain Water Hydroponic Pump with US-plu...

User Ratings: 51 49

UEETEK First Impressions

"Other then that."

Just give me one simple, accurate reading to go by, and I'm happy. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. Comes with a nice carrying case for easy and secure transportation. Does just as good of a job of any meter you would buy at the store! This is perfect to keep a check on the salt level in your tank. Small problem with bubbles on the needle but other than that no issues. Very easy, turn screw very slowly to calibrate.

  • UEETEK Heavy Duty Submersible Pump for Aquarium,Powerhead Fountain Water Hydroponic Pump with US-plug for Fish Tank,2.3 x 1.7 x 2.0 inch (L x W x H)
  • This submersible pump is designed for reliability and ultra-quiet operation.
  • Small size, high efficiency, low consumption, low noise.
  • Suction cups to fit vertical or horizontal mounting.
  • Suitable for use in hydroponic systems, ponds, fresh and saltwater aquariums, fountains and filter systems.
  • Note: The item is with US plug adapter:NLY for 110V, NOT for 220V. Please confirm the voltage of your area before placing an order.
  • Manufacture: UEETEK
  • Product Dimensions: 2.28 x 1.65 x 1.97 inches; 7.41 Ounces
  • Editor's Impressions Of The UEETEK
  • Accuracy [star rating='2.3']
  • Quality [star rating='3.5']
  • Value For Money [star rating='4']
  • Affordability [star rating='3.1']

UEETEK Final Thoughts

"Nice product!"

So once your instant ocean shows a measurement. When I saw the price offered on this one, I decided to buy and I love it. There are conversion charts and tables online. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. Small problem with bubbles on the needle but other than that no issues. Like that it comes with everything needed. Don't spend your money on calibration solution.

Overall Score
3.1

[star rating="3.1"]
(3 Points)

4. Aeroway Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.)

User Ratings: 79 3

Aeroway 8541957182 First Impressions

"021 the other read."

Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. Normally that gives the more accurate reading. I will get one later but for now this will do, since im just starting. I run brackish tanks and it works perfectly. I strongly recommend a refractometer vs. This device is a godsend and so much easier and cleaner to use. On the shaft of the refractometer, there's a little, rubber-covered nub.

  • Aeroway Salinity Refractometer, Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.)
  • Measure salt water or salinity of water, ideal for aquariums and marine monitoring.
  • Features automatic temperature compensation (ATC),The main part is made of chromium, it's very durable.
  • Measures on 2 scales, Specific Gravity (D 20/20) and parts per thousand (‰).
  • Comes with hard case, dropper, screwdriver and cleaning cloth.
  • We offer premium quality and the best service, no matter what reason cause dissatisfaction,just return it within 30 days for a full refund. No questions asked, no hassle.
  • Manufacture: Aeroway
  • Editor's Impressions Of The Aeroway 8541957182
  • Accuracy [star rating='3.7']
  • Quality [star rating='4.2']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='4.7']

Aeroway 8541957182 Final Thoughts

"Works great!"

Simple to use, but if there are any air bubbles the results will be way off. I compared the readings using this hygrometer and the calibrated refractometer. Normally that gives the more accurate reading. It's a basic but reliable refractomer I use it for my aquariums. Every time I leave to do something I come back and it's at the bottom of my tank. I bought this and a hydrometer because of the reviews saying its not accurate. So worth it considering its great quality and great price.

Overall Score
4.6

[star rating="4.6"]
(43 Points)

5. Digital Salinity Meter, SA287 Portable Digital Salinity Meter High Precision Salinity Temperature Pe...

Jadpes First Impressions

"Works great for reefing!"

At first, I was getting bubbles sticking to the rotating arrow. Perfrct for someone learning or anyone for that matter. Works great,& comes in a storage box. Then I made a mark on it to set the salinity of my fish tank. Bubbles can greatly affect the reading. I tried it over and over and no bubbles! I think those reviews just didn't know how to use it properly.

  • Digital Salinity Meter, SA287 Portable Digital Salinity Meter High Precision Salinity Temperature Pen Type Tester for Saltwater, Swimming Pool, Aquaculture, Aquarium
  • WATERPROOF SALINITY METER:It displays the salinity value precisely, compact size and light weight, easy and portable to carry, convenient to use.This instrument can not only detect the salt content of edible salt, salt water pool and koi fish pond, but also the salinity of seawater, marine, salt water fish tank salt level testing.
  • SALINITY TESTER:Digital Salinity Tester for Salt Water.The pen type salinity meter is a precision instrument for testing the salinity value of a solution.Quick and reliable manner for most regular water solutions' testing.
  • WIDE APPLICATIONS:Suitable for saltwater, swimming pool, aquaculture, aquarium (seawater) and pond, food processing and health care products industry. Saltwater Tester for Seawater, Aquariums, Marine Monitoring.
  • BACKLIT DESIGN:It adopts large screen LCD, PPT standard unit display, power display, power data protection function, automatic temperature compensation, dustproof and waterproof functions.
  • APPLICATION:Its full-featured performance, easy operation and replaceable electrodes make it the best choice for rapid, accurate salinity testing in laboratories, sites and schools.
  • Manufacture: Jadpes
  • Product Dimensions: 0.39 x 0.39 x 0.39 inches; 5.29 Ounces
  • Editor's Impressions Of The Jadpes
  • Accuracy [star rating='3.3']
  • Quality [star rating='2.9']
  • Value For Money [star rating='3']
  • Affordability [star rating='2.7']

Jadpes Final Thoughts

"Couldn't do without it."

YOU WILL NOT get an accurate reading if there are bubbles on the needle. It did not need adjusting to calibrate, though I tried to just to see how it worked. This is perfect to keep a check on the salt level in your tank. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. My only criticism would be that it's a little too dark. It is essential to get some specialized aquarium calibration fluid for 1. I have purchased before will buy again!

Overall Score
3.0

[star rating="3"]
(1 Points)

6. Aquarium Equip UP Glass Saltwater Hydrometer - Reef Soft Coral Salinity Marine Fish Shrimp sea

User Ratings: 55 17

Aquarium Equip D667 UP??????? First Impressions

"No assembly required."

Hate the batteries, but once loaded, it seems to work fine. And it is much more accurate than my old salinity meter. Be sure to buy the calibration solution and test this before use! My only criticism would be that it's a little too dark. It is a little cheaper made but it works great for the cost! It works, we'll i assume it does as i have nothing to compare it to. I was surprise that the product was really cheap compare to the other ones.

  • Aquarium Equip UP Glass Saltwater Hydrometer - Reef Soft Coral Salinity Marine Fish Shrimp sea
  • 1. Easy to use 2. Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums 3. Hydrometer measures specific gravity 4. Need it for raising brine shrimp
  • Manufacture: D667 UP玻璃海水比重計
  • Product Dimensions: 0.8 x 0.8 x 6.2 inches; 0.3 Ounces
  • Editor's Impressions Of The Aquarium Equip D667 UP???????
  • Accuracy [star rating='3.6']
  • Quality [star rating='3.6']
  • Value For Money [star rating='4']
  • Affordability [star rating='4.1']

Aquarium Equip D667 UP??????? Final Thoughts

"No assembly required."

I tried it over and over and no bubbles! Easy to use, easy to clean, easy to read. I did NOT calibrate, but am getting accurate readings. Small problem with bubbles on the needle but other than that no issues. Find a good light source to make reading easier. It's a basic but reliable refractomer I use it for my aquariums. This refractor should last a good number of years.

Overall Score
3.8

[star rating="3.8"]
(8 Points)

7. Ade Advanced Optics aaosal-B Automatic Temperature Compensation Sea Water Salinity Refractometer for...

User Ratings: 26 41

Ade Advanced Optics aaosal-B First Impressions

"Be well my friend."

Comes with a nice carrying case for easy and secure transportation. I have gone two years in this hobby with a hydrometer. It says in the instructions to use distilled water. Good quality and simple to use refractometer. The refractor was off out off the box. It is heavy and easy to read in any light. I use this for my 10g brackish and it works ok.

  • Ade Advanced Optics aaosal-B Automatic Temperature Compensation Sea Water Salinity Refractometer for Aquarium, 0% - 10% and 1.0 to 1.070 S.G. Dual Scale Hydrometer, Black
  • Manufacture: Ade Advanced Optics
  • Editor's Impressions Of The Ade Advanced Optics aaosal-B
  • Accuracy [star rating='2.2']
  • Quality [star rating='3.2']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='3.1']

Ade Advanced Optics aaosal-B Final Thoughts

"Couldn't be happier."

Would be nice if stem were slightly larger for easier read. Looks to provide very accurate readings. Works well on my Saltwater Aquarium. I've tried several different refractometers now and they are mostly the same. 027, I'm so glad I bought this one and it came spot on. I use this to check the specific gravity of my marine aquarium. I felt it wasn't accurate which was verified by my LFS.

Overall Score
3.0

[star rating="3"]
(4 Points)

8. Dr. Marine Saltwater Marine Aquarium Salinity Portable Refractometer Meter ATC 0~10% reef

Aquarium Equip D-803 UP鹽度檢測器 First Impressions

"Great Product, Thanks!"

I bought this and a hydrometer because of the reviews saying its not accurate. Great product I used for beer making and my saltwater aquarium. Bought this one to check my old one, this one checked right on the dot at 1. I needed this product and it is a lot less expensive than the local aquarium store. Simple to use, but if there are any air bubbles the results will be way off. I have purchased before will buy again! Don't spend your money on calibration solution.

  • Dr. Marine Saltwater Marine Aquarium Salinity Portable Refractometer Meter ATC 0~10% reef
  • This latest salinity refractometer is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and concentration (Parts per Thousand) of salt in water.
  • Manufacture: UP AQUA
  • Editor's Impressions Of The Aquarium Equip D-803 UP鹽度檢測器
  • Accuracy [star rating='4.1']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.2']

Aquarium Equip D-803 UP鹽度檢測器 Final Thoughts

"Good product."

Now that it's calibrated I love it! On the shaft of the refractometer, there's a little, rubber-covered nub. Get precise salinity readings in moments. I bought this and a hydrometer because of the reviews saying its not accurate. Get precise salinity readings in moments. Comes with a nice carrying case for easy and secure transportation. Not sure how accurate it is, but it's a good reference point.

Overall Score
5.0

[star rating="5"]
(1 Points)

9. GXSTWU Reptile Hygrometer Thermometer LCD Display Digital Reptile Tank Hygrometer Thermometer with H...

User Ratings: 71 5

GXSTWU HY-2 First Impressions

"Couldn't be happier."

I compared the readings using this hygrometer and the calibrated refractometer. But with alittle persistance I am able to read it. Not sure how accurate it is, but it's a good reference point. There are conversion charts and tables online. I will get one later but for now this will do, since im just starting. So once your instant ocean shows a measurement. Find a good light source to make reading easier.

  • GXSTWU Reptile Hygrometer Thermometer LCD Display Digital Reptile Tank Hygrometer Thermometer with Hook Temperature Humidity Meter Gauge for Reptile Tanks, Terrariums, Vivarium
  • 100% Brand New and High-Quality Reptile Tank Thermometer Hygrometer: Precise supervision of the temperature and air humidity in terrariums, vivariums and reptile tanks.
  • Stylish Design: Stylish looking digital vivarum thermometer with hook and loop for easy to install to any reptile tanks or terrariums. Comes with a battery so you can use the thermometer immediately.
  • Fantastic Value: This accurate reptile thermometer and hygrometer allows you to monitor the temperature and humidity in the reptile tanks at all times to makesure your beloved reptiles are in perfect health.
  • Fahrenheit Celsius Convertible: Temperature can be display in Fahrenheit or Celsius by press the C/F hole on the back of the item with a paper clip.
  • Quality Guaranteed: Our carefully sourced range of thermometer hygrometers are manufactured to the highest of standards our customers expect. And provide 365 days warranty, in case of any quality problems, please feel free to contact us by email, we will give you a satisfactory solution.
  • Manufacture: Cangda Electronics Co., Ltd.
  • Product Dimensions: 2.09 x 0.67 x 1.3 inches; 0.92 Ounces
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The GXSTWU HY-2
  • Accuracy [star rating='4.7']
  • Quality [star rating='4.7']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='4.8']

GXSTWU HY-2 Final Thoughts

"Seems pretty solid."

Hate the batteries, but once loaded, it seems to work fine. If you let it sit in the tank overnight, it definitely gives an accurate reading. Like that it comes with everything needed. Get precise salinity readings in moments. I have to recalibrate it ever use though which worries me sometimes. This one read perfect, and the others were completely inaccurate. Plus it is super easy to use and clean.

Overall Score
4.4

[star rating="4.4"]
(265 Points)

10. Bubble Magus Digital Color Screen Salinity Meter

Bubble Magus First Impressions

"Good value."

YOU WILL NOT get an accurate reading if there are bubbles on the needle. Every time I leave to do something I come back and it's at the bottom of my tank. On the shaft of the refractometer, there's a little, rubber-covered nub. However, the numbers are soooo small it is sometimes hard to read. Just rinse with warm water afterwards. I use this for my 10g brackish and it works ok. Bought this as a back up refractometer.

  • Bubble Magus Digital Color Screen Salinity Meter
  • Manufacture: Bubble Magus
  • Editor's Impressions Of The Bubble Magus
  • Accuracy [star rating='4.8']
  • Quality [star rating='5']
  • Value For Money [star rating='4.1']
  • Affordability [star rating='4.7']

Bubble Magus Final Thoughts

"Easy to use."

Functions just as it is supposed to. Be sure to buy the calibration solution and test this before use! Ambient room light at night is not enough and makes what you're viewing dark. It is a little cheaper made but it works great for the cost! I decided to upgrade and it was easy to calibrate. I would recommend this product to anyone that has a marine aquarium. So worth it considering its great quality and great price.

Overall Score
5.0

[star rating="5"]
(1 Points)

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