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Your cart is empty.Accurate reference for the calibration of seawater refractometers, hydrometers & other density measuring equipment. 35 ppt Salinity1. 0264 Specific Gravity1. 3394 Refractive Index53 uS/cm at 25 deg c
TDJ
2025-07-28 14:51:40
Calibrated my meter with it made a minor adjustment and then checked with distilled water and was spot on.
L. Richter
2025-07-26 21:04:36
I just got this to double check that my refractometer was calibrated correctly. I had another brand of calibration fluid and wanted to make sure it was still good. This fluid confirmed exactly the same as the other one. And a better price than the others.
Bruce Musgrove
2025-07-16 18:40:31
Advertised as 35 PPT and it was spy on, verified against 4 refractometers and 3 electronic readers. Brighter ll is always as advertised, unlike a few competitors that can be all over the map
Bryant C.
2025-07-07 19:47:28
It does the job well, reading the right SG works on my refractometer. I only wonder how accurate the drops are when putting them on the glass, I would have liked to use a syringe for the exact amount of fluid.
SaltwaterTony
2025-06-21 12:26:53
I got this when I ordered my refractometer. The fluid is set to a specific salinity (not 0, its 1.0264) that allows to to calibrate your refractometer. Worth it to ensure accuracy.
Ed Mor
2025-05-01 13:16:19
it works as intended
Eric Rosnick
2025-04-30 10:24:04
Shook the bottle for several minutes and when I used it came up as 20ppt, double checked with remaining Fritz fluid I’ve been using for the past year and it’s definitely off by a good amount. I bought a couple of months early so I’d have it on hand and now it’s outside my return window so I’ll just have to toss it
Jose Hernandez
2025-04-18 16:43:31
Good value for your money
Customer
2025-04-07 18:02:37
works as needed.
Alex
2025-02-19 18:32:23
I bought this product as I was about to run out of the acurasea that I had previously been using and I couldn't get more of that brand, I was shocked when I put this on my refractometer and it read as 1.030. I had a feeling this wasn't right and after searching sone forums I found I wasn't the only person to have this issue.To be sure that it wasn't the old solution I did a few things to check, I tested the old solution to check it definitely read correct, I tested my tank to see what that read, I tested my tank with a hydrometer which although not perfect read as expected and I made my own solution to test. I then put all three of these into a hydrometer and that said the brightwell was also wrong compared to the others. All of these test showed me that the product infact reads wrong and doesn't calibrate a refractometer properly.I would stay well away from this product, it will make you think all of your equipment is faulty and doubt everything you use to test. My advice is to either get acurasea that I know to be accurate or do some googling and make your own solution. It will save you alot of confusion and work.
Customer
2025-01-08 21:40:50
calibrated my hydrometer from distilled water to 0 and this read 1.030 compare to my tank reading of 0.025 and a home made sodium chloride reading of 0.025, I would stay well away, you will do damage with this product.
Brandon
2025-01-07 15:51:53
Reads at 39 ppt
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