Red Sea Seawater Refractometer

Once you learn how to use this piece of equipment properly, it is perfect. It's accurate, and easy to calibrate. I love it!

I was not too sure what to expect after purchasing due to mixed reviews. I am impressed. This is really to use, you don't need calibration solution just use your RO water to calibrate to 0. I check every time i use it and after about 6 uses i had to slightly calibrate but not significantly. I have used the fluval salinity meter and had to replace yearly so i thought i would try a refractometer and i would never go back. Calibration takes seconds and at least you do not need to take about 10 -15 min like the digital ones getting it perfect. I have a digital one too and hate it, too much time spent calibrating and too much money on calibration solution. This one is perfect and simple to use, it has a nice case, instruction book is easy to follow, calibration tool and a plastic dropper. all fit in case nicely.

Exelente todo me llego bien tiempo y forma lo recomiendo al 100 pero el unico problema fue que me realizaron un csrgo dovle a mi tarjeta y aun no me responden de eso saludos

Works great, expensive, easy to use, good quality.

Great tool for salt water tanks, it’s nice and heavy and so much cheaper then the store.I used a hydrometer and i will never go back to that, this is simple and fast, when i received it it was well calibrated and kept the calibration till now!I recommend this red sea refractometer this company has very good products.