Continuum Reagents Refractometer Calibration Standard – Seawater Reference for Calibration of Density Measuring Equipment, 60 ml

This calibration fluid by reagents matches with Bulk Reef Supply, Refracto Juice, Calibration fluid for salinity. Faster shipping than BRS’s.

They work perfectly

So I used this calibrate my refractometer for my reef tank. turn out i was a bit high and had to adjust the calibration screw to get the correct reading. 5 stars from me for ease of use and price.

Bottle was full to top which was nice. This will last me at least a year.

I bought this item to help calibrate my refractometer and instead, it gave me an inaccurate reading for my salinity. I followed the direction exactly to the "T". With the refractometer that I bought its directions told me to calibrate with distilled water and I would get the right salinity range for my reef tank. I also ensured my refractometer was calibrated amongst other fellow hobbyists and local fish stores around my area by testing my salinity for the same reading. I must have received a bad batch of calibration fluid, but for me to go through all that trouble to second guess my reading with my refractometer after using this fluid gives me less confidence to buy this item again.

tested with another solution as well. both are around 1.026.

Used this for my refractometer that keeps going out of calibration. Would buy again.

it works