Looking for the best Aquarium Hydrometers?
Discover now our comparison of the best Aquarium Hydrometers. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Aquarium Hydrometers are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Aquarium Hydrometers in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
SaleNo. 1
Coralife Aquarium Fish Tank Deep Six Hydrometer For Measuring Water Salinity PPT and Specific Gravity
- Coralife is one of the marketâs leading manufacturers of premium aquarium products.
- Coralife'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.
−24%
$9.52
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No. 2
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.
$17.99
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No. 4
hygger Salinity Tester, Transparent Acrylic Aquarium Hydrometer Sea Specific Gravity Test Salinity Meter for Fish Tank Pond Water Saltwater Freshwater, Accurate Automatic Hydrometer
- đMarine hydrometer: Tests salinity and specific gravity in marine aquariums to help maintain a healthy tank
- đEasy to Read & Use: Simply dunk in aquarium to fill with water, then set on level surface to read. The easy-to-read swing-arm pointer and extra wide stable base provide an accurate test result.
- đSpecification: The reading is temperature-corrected and accurate to +/-0.001. The unit of specific gravity is 1. 000-1. 030 (ppt value: 0-43.9 degrees), the safe area is 1.020-1.023 (ppt value: 30.2-34.2 degrees), and the low specific gravity area is 1.000-1.019 (ppt value: 0- 28.9 degrees), the higher specific gravity area is 1.024-1.030 (ppt value: 35.5-43.9 degrees).
- đSafe Material: The salinity tester is made of transparent acrylic material, which is relatively hard and easy to read the salt and specific gravity of your marine aquarium. After use, soak this saltwater meter in mild acid(vinegar) for 30 minutes, rinse with tap water and air dry.
- đWide 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.
$9.99
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No. 5
Salinity Refractometer for Aquarium Seawater Marine Fishkeeping Salinity Tester 0-100PPT & 1.000-1.070 Salinity Hydrometer Slatwater Refractometer with Automatic Temperature Compensation (ATC)
- MEASURES ON 2 SCALES - Aquarium Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100â° , allow to get two results in different units by one test
- WIDELY USE - Salinity Refractometer measures saltwater, salinity of water or seawater, ideal for aquariums, marine monitoring, fish-keeping, and saltwater pools
- ATC FUNCTION - Saltwater refractometer with automatic temperature compensation (ATC) function, allow you to obtain the accurate result faster and easier
- EASY TO USE - Put 2-3 drops of sample on the refracotmterâs prism, towards light, read the accurate readings through the optics eyepiece directly
- DURABLE MATERIAL: The optic salinity tester is made of aluminum and ABS rubber, anti-rust, non-staining and resistant abrasion. Portable Refractometer comes with plastic case, mini screwdriver,a dropper and a cleaning cloth
$15.99
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SaleNo. 6
Fluval Sea Hydrometer for Aquarium, Medium
- Performance driven at affordable prices
- Made in the USA with quality materials
- Field tested to ensure nothing but the best for your pet
- Item Package Weight: 0.185
No. 7
boxtech Aquarium Marine Test, Sea Saltwater Hydrometer, Reef Ocean Hydrometer Salinity Meter for Pool Aquarium Water Salinity Specific Gravity Test
- đ Safe Material & Unique Design: Made of durable Acrylic, this Fish Tank Test Kit salinity Hydrometer is designed with an automatic level function
- đ 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
- đ 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
- đ 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
- đ 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
$9.99
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No. 8
Fish Tank Aquarium Glass Float Hydrometer w/ Thermometer Salt Water Marine 20 cm
- For aquarium
- Floating type
- Easy accurate readings
- Ideal level between 1.020-1.025
No. 9
baixikly Hydrometer Saltwater Aquarium Salinity Tester for Saltwater Aquarium Hydrometer for Testing Salinity and Specific Gravity
- ăMaterialăThe sea hydrometer is made of plastic, the structure is sturdy and resistant, not easy to be damaged, and has a long service life.
- ăUnique DesignăTransparent design, easy to read accurate measurement readings, please wash with water after each use.
- ăPreciseăOur seawater hydrometer has clear scales and small errors, with an accuracy of +(-) 0.002 specific gravity units.
- ăTipsăPlease use it at a depth of 6in/15cm to avoid errors caused by inhaling the oil film on the water surface.
- ăApplicationăSuitable for testing salinity and specific gravity in saltwater and marine aquariums.
$8.59
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No. 10
AUTOUTLET Salinity Refractometer Saltwater Aquarium for Seawater, Pool, Tank, Marine, Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Salinity Hydrometer Kit
- ăAUTOUTLET Salinity RefractometerăThis salinity tester is used to measure salinity of brine/seawater, monitor and control the concentration of saltwater. Ideal for aquariums and marine applications.
- ăMeasures on 2 ScalesăThis saltwater hydrometer measures on dual scales: specific gravity and salinity. Ideal for aquariums, marine monitoring, agriculture, gardening and educational purposes.
- ăMeasurement RangeăDensity of 1.0-1.070 with min scale of 0.001. Concentration of 0-100â°, with min scale of 1â° (1â°=1PPT=1000PPM, PPT means âparts per thousandâ, PPM means âparts per millionâ)
- ăWith ATC FunctionăATC compensation Range (i.e. Built-in Automatic Temperature Compensation System) from 10â to 30â.
- ăSolid and LightweightăSalinity 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.
$16.99
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Last update on 2025-03-10 / Affiliate links / Images from Amazon Product Advertising API