Calibration Solutions

[PotomacBoater]

I want to calibrate my PH and Conductivity probes

but the shipping alone from Neptune is almost $15

 

do LFS's carry it

or is there a cheaper place to get it???

 

Thanks,

 

Matt

[Origami]

pH calibration solution is common. You may find conductivity solution, too. Call first. I'm sure I've seen some at both BRK and F&F.

[zygote2k]

i have some extra if you want it.

[bill stine]

got mine on ebay, 3 packs for $2.99 + $2.99 shipping for a $5.98 total

 

Here has standard 4.0, 7.0, and 10.1 solutions

[Origami]

got mine on ebay, 3 packs for $2.99 + $2.99 shipping for a $5.98 total

 

Here has standard 4.0, 7.0, and 10.1 solutions

^^Great price. Milwaukee makes good calibration solutions, too. Nice score.

[PotomacBoater]

PH is easy to find, its Conductivity I've had a harder time getting.

 

BUT

What do you do when your conductivity probe is reading low (6.0)?

2 hours of soaking the probe in vinegar, and now its back to 52

;-)

 

Thanks for all the help!

[bill stine]

For future reference - 12880 uS/cm Conductivity EC Calibration Solution

[Origami]

Actually, in this hobby you want to use a 52 mS/cm calibration solution for high conductivity probes.

 

Randy Holmes-Farley wrote a nice little article some years ago where he gave formulas for some DIY salinity standards. Here's the link

 

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