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Home » Saltwater Aquarium Supplies  » Testing Equipment  » Hydrometers & Refractometers  » Refractometers  »  Marine Depot Aquarium Pro Refractometer
Marine Depot Aquarium Pro Refractometer

Marine Depot Aquarium Pro Refractometer

Average Rating 4.5 40
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Marine Depot Aquarium Pro Refractometer Information




Designed specifically for aquarium use to measure the salinity of natural sea water (NSW). Most handheld saltwater refractometers available in the hobby are designed and calibrated for testing brine solution, i.e. sodium chloride, and are not calibrated for the refractive index of natural sea water. This is a very important distinction: other salinity refractometers used for marine aquariums are designed to test saltwater and nothing else! The Marine Depot Aquarium Pro Refractometer is designed to measure the salinity of NSW taking into account all the other elements that comprise salinity in the marine water sample.

Even though the largest percentage of salt in the sea is sodium chloride, the presence of other significant ions such as magnesium and calcium in NSW results in a different refractive index to that of brine. A standard (brine) refractometer will therefore not give the correct salinity for NSW and a conversion factor must be applied.

For example, a 35 ppt (parts per thousand) solution of NSW has the same refractive index as a 36.5 ppt solution of brine. When using a brine refractometer, an aquarium hobbyist should therefore look for a reading of 36.5 ppt when trying to achieve a reading of 35 ppt for NSW.

Easier to Read

One of the other problems with most refractometers is the scale displayed normally reads from 0-100 ppt when we are really only interested in the region from 30-40 ppt. The Marine Depot Aquarium Pro Refractometer has therefore been specifically designed to read from 1.015-1.030 which gives you much better resolution of a normal 1.000-1.070 scale.

  • Marine Depot Aquarium Pro Refractometer
  • Protective Hardshell Case
  • Pipette
  • Soft Cloth
  • Calibration Screw Driver





Manufacturer Info

MarineDepot.com carries more than 7,500 popular and hard-to-find aquarium supplies and fish tank accessories for saltwater and freshwater aquariums. You’ll find the top aquarium equipment and aquarium accessories from Hagen, Red Sea, Eheim, Coralife and many more. All of our aquarium pet supplies carry a 60-day money-back guarantee and we offer a Low Price Guarantee on all in-stock aquarium products. We ship 99.9% of fish tank supplies the same business day if you place your order before 6 PM EST. If you have any questions about fish supplies please do not hesitate to contact us. We’re here to help!

Warranty

12 Month manufacturer warranty.


Marine Depot Aquarium Pro Refractometer Reviews



Average Rating
(40 reviews)
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Works as advertised

by
Reviewers Rating Excellent!


Posted: 8/2/2016 from AUSTIN, TX UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: Works just fine. It would be nice if the case were longer so that the refractor can be stored while extended (focused).


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A must have!

by
Reviewers Rating Excellent!


Posted: 4/28/2016 from WINSTON SALEM, NC UNITED STATE
5.0 5
Experience Level: Intermediate


Comments: This is a must have tool for any marine aquarium. I love this thing! Easy to use and accurate. Thanks marine depot!


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Accurate

by
Reviewers Rating Excellent!


Posted: 4/11/2016 from CORONADO, CA UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: Great device at a reasonable price. came calibrated, works great all reefers should have one.


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Good Tool

by
Reviewers Rating Excellent!


Posted: 2/21/2016 from RALEIGH, NC UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: Easy to use tool for measuring water saltwater gravity levels!!


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good

by
Reviewers Rating Great


Posted: 9/1/2015 from HUNTINGTON, WV UNITED STATES
4.0 5
Experience Level: Intermediate


Comments: The refractometer works well with a single caveat. I would have preferred the scales to go all the way down to zero. Otherwise no complaints.


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Great Product!

by
Reviewers Rating Excellent!


Posted: 9/22/2014 from Southfield, MI UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I am very impressed with this product. It is well made and, above all, very accurate. I made the mistake of solely using an inexpensive hydrometer, which over time became inaccurate. Because of this my salinity dropped to very low levels and before I found the problem I had lost a few corals and a clam. This product is very easy to calibrate using R/O water and the sample only requires a couple drops of aquarium water! I will enjoy using this product and will not have to second guess the reading anymore.


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Refractometer

by
Reviewers Rating Excellent!


Posted: 5/19/2014 from READING, PA UNITED STATES
5.0 5
Experience Level: Expert


Comments: The Marine Depot refractometer is much lighter than the model I am accustomed to which gave me the impression it may not be as sturdy as my previous model. However, the Marine Depot refractometer is more accurate. I have no idea why it is noticeably lighter but I would recommend it strictly due to it's accuracy. I have performed calibration tests with ro water and certified 35ppt synthetic calibration fluid-The Marine Depot model is more accurate than my previous more expensive model.


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A great tool

by
Reviewers Rating Excellent!


Posted: 1/20/2014 from HENRICO, VA UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I found the refractometer very easy to use. I like the fact that I now have readings on both salinity and specific gravity. Worth the expense in my opinion.


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Pro Refractometer

by
Reviewers Rating Excellent!


Posted: 10/15/2013 from MASTIC BEACH, NY UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: This is very easy to read. Highly recommend this item for the serious aquarium buff.


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Nice Unit

by
Reviewers Rating Excellent!


Posted: 8/26/2013 from FEDERAL WAY, WA UNITED STATES
5.0 5
Experience Level: Intermediate


Comments: I love this new refractometer! The reason I purchased this is because of thescale that you see in the view finder. All the other brands out there all go up to 1.070 and the scale really small and a it difficult to read. And there is no need to go that high for reef tanks. This scale only goes up to 1.030 and the scale is larger and much easier to read and get accurate. I let it acclimate to the temperature for a little while then used RO water to calibrate and it was dead on. didn't even have to adjust. I just got this last week and I am extremely happy. I would highly recommend this to anyone wanting a good refractometer.


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