Red Sea Refractometer

Refractometer by Red Sea

6 ratings

Used in 51 aquariums

By echogi on February 27, 2018
By mepluribus on June 19, 2017
I have not had any issues with this refractometer so far.
By adammahne on February 21, 2017
I like it but have to calibrate it about every 2 weeks.
By nano on February 16, 2017
Seems to need constant calibration, I use a reference sample (Two Little Fishies Accurasea) at 1.025 just to make sure its on point.
By carlonaz on January 30, 2017
Love mine very accurate
By lobo2304 on January 20, 2017
Not a good rs product.Maybe I was unlucky but my refract. was showing 33ppt and in reality I had 37 in my tank. Bad readings all time and I had to calibrate it to every measurement.I ask for a refund and I obtained it but I can't recommend. I gave 2 stars for the refund.

Some of the 51 aquariums that use Red Sea Refractometer