Hanna Salinity calibration solution HI 70024P or HI-7037L?

[ConectadoNZ]

HI-7037L 100% Sodium Chloride (NaCl) Calibration Solution and it’s valid for 5 years, so why should I buy the 35ppt sachets instead?
So would not be the same thing?

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35.00 ppt Marine Salinity Calibration Standard (25 x 20 ml) - HI70024P

HI70024P is a premium quality 35.00 ppt marine salinity calibration standard that is NIST traceable and contained in portable single-use sachets. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hanna’s...

hanna-worldwide.com

100% NaCl Calibration Solution for Seawater Salinty Readings (500 mL) - HI7037L

HI7037L is a premium quality 100% NaCl calibration solution for % readings of salinity. Hanna calibration solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper-proof seal to ensure the quality of the solution. Hanna’s line of calibration...

hanna-worldwide.com

 

[jsker]

Myself, I would purchase the liquid instead of the packets.

It all really depends how much you will be testing and calibrating. I you are going to calibrate, for example 4 times a year. The packets would be a better choice.

 

[LeftyReefer]

FYI, the bottles are valid for (5) years, if unopened. Not, once they are opened....
I'm not sure how long they will be good once they are opened, Hanna doesn't say.

Also, that solution is not a 35 ppt sea water solution as far as I can tell. it says it's 100% NaCl. So that means its a bottle of 100% Sodium Chloride. I think it is for making your own solution at whatever level you want.

So not as easy as using the premixed sachets.

 

[Randy Holmes-Farley]

I’d be very cautious with the lower one as it says nothing that I can find about concentration or what sort of device one can use it for. The description is unbelievably bad, even in the specifications section.

 

[LeftyReefer]

I’d be very cautious with the lower one as it says nothing that I can find about concentration or what sort of device one can use it for. The description is unbelievably bad, even in the specifications section.

it says its 100% NaCl. Which would mean its a 100% concentration of sodium chloride. Its not a 35ppt solution as far as I can tell.

 

[Randy Holmes-Farley]

it says its 100% NaCl. Which would mean its a 100% concentration of sodium chloride. Its not a 35ppt solution as far as I can tell.

It cannot be 100% NaCl and be a solution, which Hanna also claims it is.. Hanna has messed up the description and there’s no indication of what concentration it really is.

 

[ConectadoNZ]

It cannot be 100% NaCl and be a solution, which Hanna also claims it is.. Hanna has messed up the description and there’s no indication of what concentration it really is.

That is why I am here asking!

 

[Gtinnel]

Why not just use Randy’s directions in this article to make your own? That’s what I do now and it’s incredibly easy and nearly free.

http://www.reefkeeping.com/issues/2004-06/rhf/