LF: Salinity calibration fluid - YYC
 

Somehow lost my refractometer calibration fluid. I like to calibrate my meter every 6 months or so.

Looking for salinity calibration fluid in Calgary.

I got mine from Wai's

go buy some distilled water.

R/O water

diy cal fluid
 

I have 30ml bottles of diy cal fluid made from Randy HolmesFarley recipe and verified at a Calgary lab. $5 or frag for a bottle....
Haven't found any evidence that this fluid is off but when compared to pinpoint fluid it reads a bit high or low meaning the pinpoint stuff is not consistent batch to batch.

I just dont trust RO water as a calibration fluid for aome reason. Never have. I'll give it a try.

Im pretty sure there is a list of refractometers that calibrate fine with RO. Its the cheap ones with no brandname that were found to be reading low when calibrated with RO. I think the redsea one is also not good for RO cal. Randy has a big article on Advancedaquarist.com about calibration standards

Calibration fluid is cheap, $10 will get you ten years worth.

Correct. Finding it is a little harder.

Think its about $20 a bottle in Calgary.... and if you buy 1 from two different stores they will read different also lol.