Editor's Choice - Our Favorite UEETEK Aquarium Hydrometers

1. 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']

Here Are Some Other Related Aquarium Hydrometers

2. Fluval Sea Hydrometer for Aquarium, Medium

User Ratings: 46 17

Fluval 14356 First Impressions

"Works perfectly."

Hate the batteries, but once loaded, it seems to work fine. Like that it comes with everything needed. There are conversion charts and tables online. Now its easy to make sure I have the correct amount of salt in my aquariums. The product itself is very good quality and the included instructions are very clear. The reading is big enough for you to read and it comes with the batteries. Small problem with bubbles on the needle but other than that no issues.

• Fluval Sea Hydrometer for Aquarium, Medium
• Helps measure specific gravity and salt level in marine aquariums
• Features large, easy to read markings
• Simple design-blends in easily
• Item Package Weight: 0.185
• Manufacture: Fluval
• Item Weight: 0.81 ounces
• Product Dimensions: 1 x 5.5 x 7.9 inches

• Editor's Impressions Of The Fluval 14356
• Accuracy [star rating='3.5']
• Quality [star rating='3']
• Value For Money [star rating='2.7']
• Affordability [star rating='3.1']

3. Coralife Energy Savers ACLAF877 Deep Six Hydrometer

User Ratings: 67 7

Coralife 100108103 First Impressions

"024 and my refracto read."

I found mine was calibrated out of the box. At first, I was getting bubbles sticking to the rotating arrow. Wipe down glass surface to dry it and put it back on the shelf til next time. So once your instant ocean shows a measurement. Does just as good of a job of any meter you would buy at the store! I tried it over and over and no bubbles! Simple to use, but if there are any air bubbles the results will be way off.

• Coralife Energy Savers ACLAF877 Deep Six Hydrometer
• Included components: All Components included in Picture and Description
• 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
• Specific Gravity and Salinity PPT Scales
• Optimal Specific Gravity / Salinity range indicator on scale
• Manufacture: Central Garden & Pet
• Product Dimensions: 6.69 x 0.79 x 4.72 inches; 3.2 Ounces

• Editor's Impressions Of The Coralife 100108103
• Accuracy [star rating='4.8']
• Quality [star rating='5']
• Value For Money [star rating='4.8']
• Affordability [star rating='4.4']

4. Sinotech Hand Held Brix Honey Refractometer Rhb-90atc withCalibration Oil

Sinotech First Impressions

"This tool does that."

When I compared it to what my local pet store was reading my water at it was dead on. I would recommend this product to anyone that has a marine aquarium. Great product I used for beer making and my saltwater aquarium. Plus it is super easy to use and clean. I don't want to deal with temperature correction or. Get precise salinity readings in moments. Does just as good of a job of any meter you would buy at the store!

• Sinotech Hand Held Brix Honey Refractometer Rhb-90atc withCalibration Oil
• Test Fruit Brix And Honey Water
• Heavy-duty and lightweight With its aluminum construction
• ATC CompensationRange: 10°C~30°C (50°F~86°F)
• Protable Type
• 58-90%Brix 38-43 Be° (Baume) 12-27% Water
• Manufacture: Sinotech

• Editor's Impressions Of The Sinotech
• Accuracy [star rating='3.4']
• Quality [star rating='3.2']
• Value For Money [star rating='2.5']
• Affordability [star rating='3.4']

5. 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']

6. Exo Terra Terrarium Hydrometer

User Ratings: 66 5

Exo Terra PT2466 First Impressions

"Great product."

Great product I used for beer making and my saltwater aquarium. I couldn't decide between this and one of the float arm meters or both. For the price you definitley cant beat this meter is great! However, the numbers are soooo small it is sometimes hard to read. 027, I'm so glad I bought this one and it came spot on. Does just as good of a job of any meter you would buy at the store! He is too cute not to want to take care of properly.

• Exo Terra Terrarium Hydrometer
• Wipe clean
• Analog hygrometer
• Adhere the hygrometer in the terrarium
• Clear analog dial display
• Easy to read and install
• Great for monitoring the humidity levels
• Manufacture: Exo Terra
• Product Dimensions: 0.5 x 4.1 x 7 inches; 0.64 Ounces

• Editor's Impressions Of The Exo Terra PT2466
• Accuracy [star rating='3.4']
• Quality [star rating='3.9']
• Value For Money [star rating='4.9']
• Affordability [star rating='4.9']

7. Dual Scale Salinity Refractometer ATC 0-100ppt (0-10%) & 1.000-1.070 Specific Gravity, Portable Mete...

User Ratings: 76 4

Gain Express RES-10ATC First Impressions

"Documentation is limited."

So once your instant ocean shows a measurement. And always make sure there is no bubbles on the measuring unit. Make sure to knock out the bubbles on the white dial by hitting it with your knuckle. But with alittle persistance I am able to read it. Make your own by simply boiling some water and collecting the condensate. Works great,& comes in a storage box. Trying to turn it by hand won't work.

• Dual Scale Salinity Refractometer ATC 0-100ppt (0-10%) & 1.000-1.070 Specific Gravity, Portable Meter Tester for Seawater Salt Sea Water Aquarium Brackish Reef Tank Marine
• Range: 0-100ppt (0-10% Salinity) and Density/ Specific Gravity 1.000-1.070 1ppt Salinity and 0.001 g/cm3 Density Resolutions
• Water or a salt (brine) refractometer preferred by aquarist, it checks saltwater & brine or salinity of water, best for aquariums and marine monitoring
• True seawater or a salt (brine) refractometer preferred by aquarist
• Calibrate simply by distilled water, comes with free screwdriver for calibration
• Has automatic temperature compensation (ATC) and has built with the highest and finest quality of aluminum & rubbe
• Manufacture: Gain Express Holdings Ltd
• Part Number: REB-32ATC
• Material: ABS Material for Handle
• Item Weight: 9.9 ounces
• Color: 0-10% Salinity
• Batteries Included?: No
• Batteries Required?: No

• Editor's Impressions Of The Gain Express RES-10ATC
• Accuracy [star rating='3.6']
• Quality [star rating='5']
• Value For Money [star rating='5']
• Affordability [star rating='4.4']

8. LemonBest 0%-10% Automatic Temperature Compensation Salinity Refractometer Salt Water Aquariu...

User Ratings: 75 5

LemonBest First Impressions

"Great tool."

I don't want to deal with temperature correction or. When I compared it to what my local pet store was reading my water at it was dead on. Used distilled water to calibrate, the screw is located under the rubber cap. This one here was much cheaper,& exactly the same as they sold in the store. At first, I was getting bubbles sticking to the rotating arrow. Definitely a lot cheaper than a refractometer. I decided to upgrade and it was easy to calibrate.

• LemonBest 0%-10% Automatic Temperature Compensation Salinity Refractometer Salt Water Aquarium by Lemonbest
• Features with automatic temperature compensation (ATC) function
• Designed for testing the concentration of salt water and brine, ideal for aquariums, marine monitoring and quality control in research and clinical laboratories
• With just a couple of drops of aquarium water you know exactly what the salinity is
• Measures on 2 scales, specific Gravity (D 20/20) and parts per thousand (‰), provides a direct reading of the specific gravity and concentration of salt in water
• Comes with a hard case, dropper, screwdriver and cleaning cloth
• Manufacture: Lemonbest
• Product Dimensions: 7.87 x 1.57 x 1.57 inches; 3.88 Ounces

• Editor's Impressions Of The LemonBest
• Accuracy [star rating='5']
• Quality [star rating='5']
• Value For Money [star rating='5']
• Affordability [star rating='5']

9. AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping, 0-100P...

User Ratings: 83 2

AUTOUTLET 8541957195 First Impressions

"These seem spot on."

Not sure how accurate it is, but it's a good reference point. Ambient room light at night is not enough and makes what you're viewing dark. If you read the directions in the box for the refractometer it's for freshwater. And it is much more accurate than my old salinity meter. Waterproof if you accidentally drop it in the pool. My corals will be much happier now. It is a little cheaper made but it works great for the cost!

• 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
• 【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.
• Due to the difference of human focal lengths,when during adjusting, you may just need to rotate in reverse or re-adjust the distance between your eye and the eyepiece.
• It's necessary to keep the surrounding environment with sufficient brightness and suitable temperature during use. Generally,there is no error in the temperature between 10℃-30℃.(50℉-86℉)
• Specific Gravity (D 20/20) and parts per thousand and replaces your poor quality and difficult to read hydrometer.
• Manufacture: AUTOUTLET
• Product Dimensions: 7.87 x 3.54 x 2.36 inches; 8.48 Ounces

• Editor's Impressions Of The AUTOUTLET 8541957195
• Accuracy [star rating='5']
• Quality [star rating='4.2']
• Value For Money [star rating='4.9']
• Affordability [star rating='5']

10. TOPINCN Square Saltwater Hydrometer Salt Water Salinity Meter Accurate Automatic Hydrometer Salt Wat...

TOPINCN First Impressions

"Super easy to use."

Then I made a mark on it to set the salinity of my fish tank. This device is a godsend and so much easier and cleaner to use. 027, I'm so glad I bought this one and it came spot on. I would recommend you to purchase this and skip the other ones. This refractor should last a good number of years. Find a good light source to make reading easier. Just rinse with warm water afterwards.

• TOPINCN Square Saltwater Hydrometer Salt Water Salinity Meter Accurate Automatic Hydrometer Salt Water Salinity Meter for Fish Tank
• Accurate, durable, and easy to read sea water hydrometer
• This product is designed with an automatic level function, can automatically identify the level to avoid errors
• Very accurate measurement readings, please rest assured to purchase
• And each hydrometer has a laser engraved patent number
• Fit for brackish and marine aquariums. Perfect for testing both salinity and specific gravity of your brackish and marine tanks.
• Manufacture: TOPINCN
• Product Dimensions: 5.51 x 3.54 x 0.79 inches; 3.17 Ounces

• Editor's Impressions Of The TOPINCN
• Accuracy [star rating='4.2']
• Quality [star rating='5']
• Value For Money [star rating='5']
• Affordability [star rating='4.4']