Salinity is a very important parameter for a captive reef aquarium so it is certainly essential to have a good quality salinity refractometer on hand to monitor levels on a constant basis. One option to consider is the Pro-1 Normal Seawater Refractometer from Tropic Eden.


The folks at Tropic Eden are touting this tester as a highly precise and well built refractometer that is a quick and easy to use, whether it is for scientists out in the field or for saltwater aquarium hobbyists.


Tropic Eden Salinity Refractometer


The refractometer, which is packaged nicely, comes with a user manual, 2 pipettes, calibration key and pouch. It is an optical device that utilizes the refraction of light through transparent media to determine the salinity and specific gravity of the water being tested.


It has a double-hinged cover, a crisp, high quality prism and lens, a non-slip grip and a well balanced body built with special high density alloy for immediate heat conduction and fast testing.


The unit is calibrated at the factory but it is always a good idea to double check the calibration with RODI water before using it for the first time and to re-calibrate it on a regular basis.


Tropic Eden Salinity Refractometer


To ensure accurate readings, the prism and prism cover should be cleaned with RODI water before use to remove any dirt or salt residue. It is also wise to fill and empty the pipette dropper a few times with the seawater to be tested to eliminate any contaminant mixed into the sample.


Using the device is pretty straight forward. Add 3 to 4 drops of sample seawater on top of the lens, wait 20 to 30 seconds and take a reading by looking into the eye piece.


Overall, this refractometer was designed for advanced professional use, a good point to consider for reef tank hobbyists seeking a reliable and accurate tool to monitor salinity.


For a closer look you can check out this video.



If you are interested in more information or would like to purchase a Tropic Eden Salinity Refractometer, please visit



If you are looking for additional insights and information, please explore my many other reef tank and SPS related articles as well as my book, A ReefBum’s Guide To Keeping an SPS Reef Tank: A Blueprint For Success. And you can see all of my reef tank videos online now as well as my Live HD Webcam.


Happy reef keeping!


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This is a “sponsored post.” The company who sponsored it compensated me via a cash payment, gift, or something else of value to produce it. Regardless, I only recommend products or services I use personally and believe will be good for my readers. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”