It works and provides a high confidence for your readings By Mark on 5/19/13
Mark would recommend this product to a friend
Based on all of the reading i have done it seems like you will get the most accurate readng using this calibration fluid rather then RODI. I know my measurements appear to be more accurate after calibrations with this fluid.
Fast and easy By Eckolancer on 3/20/13
Eckolancer would recommend this product to a friend
Great product to use, makes calibrating very fast and easy.
Not something to go cheap on By Dave on 12/21/12
Dave would recommend this product to a friend
With the amount of money I have in my tank there is no way I would not have a refractometer. That said, without an accurate calibration fluid the refractometer is useless.
This fliud does the job and does it well. This is the second bottle I have re-ordered from BRS and when it runs out, I'll be ordering it again.
This is only optional if you want to do it wrong By Nick on 11/1/12
Nick would recommend this product to a friend
Marine tanks are too costly to go cheap on the salinity, so having a properly calibrated refractometer is essential. This does the job perfectly, at a very reasonable price. So many people can't be wrong about this... use the calibration fluid!
ezpz By j on 10/9/12
j would recommend this product to a friend
turns out my calibrating with ro/di had my refractometer off by .002
Calibration fluid was well worth it
On point. By Jocelyn on 7/3/12
Jocelyn would recommend this product to a friend
This solution is the back bone to keeping my paramount check. 4 stars because I do believe it's a little pricey. Having said that it is a decent sized bottle and the built in dropper is great. I will not have to buy this for a while so that makes up for a dollar or two difference I've seen in lesser quality solutions.
A necessity for just $7 By John on 4/26/12
John would recommend this product to a friend
This is a great item to keep on hand. Having a refractometer not calibrated correctly can cause major issues. There is enough fluid to last for a very long time. Great product!
must have! By Darrell on 2/5/12
Darrell would recommend this product to a friend
ok folks, add this to the "must have" list of your tank maintainence and testing supplies! I have always calibrated to 0ppt using ro/di. after getting this calibration fluid I discovered by refractometer was off by 2.5! so, i was actually mixing my salt to 1.023 1/2 instead of 1.026.
Worth it! By Justin on 2/1/12
Justin would recommend this product to a friend
I was using RO/DI water to calibrate and I am glad I switched to this! My refractometer was off by quite a bit! The built in dropper is nice as well!
just what I needed! By Dan "Deva" on 1/23/12
Dan "Deva" would recommend this product to a friend
was going to make some DIY calibration fluid but felt ALOT safer getting this . even if you are going to do some DIY fluid is it a good idea to double check it with this.
product is very easy to use glad I got it.
A+ By ak on 12/14/11
ak would recommend this product to a friend
Great product, I found that my readings were way off until I started using this product. ThankYou BRS!
Salinity fluid checker By Ryan on 11/15/11
Ryan would recommend this product to a friend
My salinity was off by about 1ppm. This came in handy.