Editor's Choice - Our Favorite Ade Advanced Optics Aquarium Hydrometers

1. Automatic Temperature Compensation Sea Water Salt Salinity Refractometer for Aquarium, 0% - 10% & 1....

User Ratings: 50 10

Ade Advanced Optics Salinity10 First Impressions

"No assembly required."

I use this for my 10g brackish and it works ok. Like that it comes with everything needed. It is essential to get some specialized aquarium calibration fluid for 1. Looks to provide very accurate readings. I was surprise that the product was really cheap compare to the other ones. It is essential to get some specialized aquarium calibration fluid for 1. Hate the batteries, but once loaded, it seems to work fine.

• Automatic Temperature Compensation Sea Water Salt Salinity Refractometer for Aquarium, 0% - 10% & 1.0 to 1.070 S.g. Dual Scale Hydrometer By Adeadvancedoptics
• Manufacture: Ade Advanced Optics®
• Product Dimensions: 8.7 x 2.8 x 1.42 inches; 6.4 Ounces

• Editor's Impressions Of The Ade Advanced Optics Salinity10
• Accuracy [star rating='4']
• Quality [star rating='4.9']
• Value For Money [star rating='3.3']
• Affordability [star rating='3.2']

Peoples Choice - Other Highly Rated Ade Advanced Optics Aquarium Hydrometers

2. NEW RHS-10ATC 0-10% Salinity Refractometer Salt Water Aquarium

User Ratings: 53 7

Ade Advanced Optics RHS-10ATC First Impressions

"So, it does seem to work."

Definitely a lot cheaper than a refractometer. I bought this refractometer as a more accurate option for salinity than a hydrometer. But there are some ways to keep on getting accurate readings. I bought this salinity meter for my aquarium. Small problem with bubbles on the needle but other than that no issues. The reading is big enough for you to read and it comes with the batteries. I don't know if that's a positive or negative but just different.

• NEW RHS-10ATC 0-10% Salinity Refractometer Salt Water Aquarium
• Manufacture: Ade Advanced Optics®

• Editor's Impressions Of The Ade Advanced Optics RHS-10ATC
• Accuracy [star rating='3.1']
• Quality [star rating='4.8']
• Value For Money [star rating='3.9']
• Affordability [star rating='3.1']

3. Ade Advanced Optics aaosal Professional Automatic Temperature Compensation Sea Water Salinity Refrac...

User Ratings: 68

Ade Advanced Optics aaosal First Impressions

"What else can I say."

I've tried several different refractometers now and they are mostly the same. When I saw the price offered on this one, I decided to buy and I love it. The refractor was off out off the box. I would suggest purchasing the salt calibration solution. I don't want to deal with temperature correction or. The product itself is very good quality and the included instructions are very clear. Looks to provide very accurate readings.

• Ade Advanced Optics aaosal Professional Automatic Temperature Compensation Sea Water Salinity Refractometer for Aquarium, Hydrometer, 0-100 ppt and 1.000-1.070 Salinity S.G.
• Manufacture: Ade Advanced Optics

• Editor's Impressions Of The Ade Advanced Optics aaosal
• Accuracy [star rating='3.5']
• Quality [star rating='5']
• Value For Money [star rating='4.5']
• Affordability [star rating='3.6']

4. 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']

Here Are Some Other Related Aquarium Hydrometers

5. Accurate Automatic Hydrometer Salt Water Salinity Meter Salinimeter for Fish Tank (Square Type)

User Ratings: 63 16

YOSOO123 First Impressions

"Seems to work fine."

It is a little cheaper made but it works great for the cost! Now that it's calibrated I love it! I got this to have a more accurate read than the hydrometer. I decided to upgrade and it was easy to calibrate. I will get one later but for now this will do, since im just starting. Now that it's calibrated I love it! Plus it is super easy to use and clean.

• Accurate Automatic Hydrometer Salt Water Salinity Meter Salinimeter for Fish Tank (Square Type)
• 15 centimeters (6 inches) from the bottom of the water to avoid the error caused by the oil film on the water.
• Keeping your hands clean and can prevent pollution of water from the fish pond.
• It is easy to read and the precision can be + (-) 0.001 units of specific gravity. Professional design make it able to get accurate reading when the temperature of the fishpond is at 18 degrees -28 degrees
• Fish pool, both inside and outside the cylinder can be read. The hydrometer that can float on the surface of the water is simple and easy to read.
• The proportion of water sample can be automatically detected. The proportion, salinity and conductivity of sea water are shown once.
• Manufacture: Yosoo123
• Part Number: Yosoo537gtqix12
• Item Weight: 3.24 ounces
• Product Dimensions: 5.51 x 3.54 x 0.79 inches
• Style: Square Type
• Batteries Included?: No
• Batteries Required?: No

• Editor's Impressions Of The YOSOO123
• Accuracy [star rating='4.2']
• Quality [star rating='4.4']
• Value For Money [star rating='3.4']
• Affordability [star rating='4.5']

6. capetsma Salinity Tester, Accurate Sea Hydrometer Aquarium Marine Salinity Meter for Fish Tank Pond ...

User Ratings: 56 11

capetsma First Impressions

"Great Product, Thanks!"

Be sure to adjust the focus by turning the eye focal when you first receive. There are conversion charts and tables online. I have gone two years in this hobby with a hydrometer. Get precise salinity readings in moments. It is a little cheaper made but it works great for the cost! Make your own by simply boiling some water and collecting the condensate. There are conversion charts and tables online.

• capetsma Salinity Tester, Accurate Sea Hydrometer Aquarium Marine Salinity Meter for Fish Tank Pond Water Saltwater Freshwater Specific Gravity Test
• 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.
• Manufacture: Capetsma

• Editor's Impressions Of The capetsma
• Accuracy [star rating='3.4']
• Quality [star rating='3.3']
• Value For Money [star rating='3']
• Affordability [star rating='3.5']

7. 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']

8. Automatic Temperature Compensation Sea Water Salt Salinity Refractometer for Aquarium, 0% - 10% & 1....

User Ratings: 50 10

Ade Advanced Optics Salinity10 First Impressions

"No assembly required."

I use this for my 10g brackish and it works ok. Like that it comes with everything needed. It is essential to get some specialized aquarium calibration fluid for 1. Looks to provide very accurate readings. I was surprise that the product was really cheap compare to the other ones. It is essential to get some specialized aquarium calibration fluid for 1. Hate the batteries, but once loaded, it seems to work fine.

• Automatic Temperature Compensation Sea Water Salt Salinity Refractometer for Aquarium, 0% - 10% & 1.0 to 1.070 S.g. Dual Scale Hydrometer By Adeadvancedoptics
• Manufacture: Ade Advanced Optics®
• Product Dimensions: 8.7 x 2.8 x 1.42 inches; 6.4 Ounces

• Editor's Impressions Of The Ade Advanced Optics Salinity10
• Accuracy [star rating='4']
• Quality [star rating='4.9']
• Value For Money [star rating='3.3']
• Affordability [star rating='3.2']

9. Pet Dog & Cat Refractometer,V-Resourcing Pet Urine Specific Gravity (1.000~1.060) Clinical Refractom...

User Ratings: 79

V·RESOURCING VLT065 First Impressions

"Seems pretty solid."

I found mine was calibrated out of the box. The water was at what I expected it should be. And it is much more accurate than my old salinity meter. This device is a godsend and so much easier and cleaner to use. It's a basic but reliable refractomer I use it for my aquariums. This refractometer came with two scales and Automatic Temperature Compensation. I got this to have a more accurate read than the hydrometer.

• Pet Dog & Cat Refractometer,V-Resourcing Pet Urine Specific Gravity (1.000~1.060) Clinical Refractometer with Serum or Plasma Protein Test (2~14 g/100ml) for Veterinary Cat,Dog, Pets
• 1.Hand-Held Pet Urine Specific Gravity Refractometer with Automatic Temperature Compensation(ATC: 10℃~30℃)
• 2.[ Measuring Range ] Dog Urine Specific Gravity:1.000~1.060 ; Cat Urine Specific Gravity:1.000~1.060 ; Serum or Plasma Protein:2~14 g/100ml
• 3.[ Easy to use ] Place 2 - 3 drops of sample onto the prism, and then look through the eyepiece for both Brix and Specific Gravity readings
• 4.[ Convenient to store ] Compact in size and light in weight, packed with a plastic case, convenient to store and carry around
• 5.[ Application ] This product provides quick and accurate indication of vital fluids levels.Ideal for clinical usage and intended for Veterinary
• N.W. of a piece: about 102g
• Product Size:19.5*4*4cm
• Package Weight:237g
• Manufacture: V-Resourcing

• Editor's Impressions Of The V·RESOURCING VLT065
• Accuracy [star rating='4.8']
• Quality [star rating='3.9']
• Value For Money [star rating='5']
• Affordability [star rating='4.5']

10. Kocome Marine Hydrometer Reef Fish Tank Aquarium Water Salinity Specific Gravity Tester

User Ratings: 71

Kocome First Impressions

"Great kit."

I use this for my 10g brackish and it works ok. Plus it is super easy to use and clean. I did NOT calibrate, but am getting accurate readings. I needed this product and it is a lot less expensive than the local aquarium store. It's fast, it's tidy, and it's accurate. But with alittle persistance I am able to read it. Don't care much for having to post a review in order to activate warranty.

• Kocome Marine Hydrometer Reef Fish Tank Aquarium Water Salinity Specific Gravity Tester
• Accurate and easy to read.
• Size: 3.54×4.72×0.59in (Approx.).
• Readings are temperature-corrected & accurate to +/- 0. 002 specific gravity units which range from 1. 000 - 1. 030 specific gravity.
• It is optimum to be put into below 6" deep water, so it can avoid the error from the oil slick.
• Perfect for testing both salinity and specific gravity of your brackish and marine tank.
• Manufacture: KOCOME

• Editor's Impressions Of The Kocome
• Accuracy [star rating='3.6']
• Quality [star rating='4.2']
• Value For Money [star rating='4']
• Affordability [star rating='3.9']