Hanna Checker Tips, Tricks, and Myths

[Reefer Matt]

Part 1

 

[blaxsun]

I'll have to try the tip on the sample syringe next time to see if there's any difference in the amount drawn.

 

[homer1475]

FWIW, if you line up several cuvettes, the line is different on each one. Never trust the line as being 10ml. Use a automatic pipette for the best accuracy.

Something like this:


Accuracy is the reason one of these is now included in the calcium checker because of the small sample volume. 1 drop in either direction can throw off the results by quite a bit

 

[gbroadbridge]

I'll have to try the tip on the sample syringe next time to see if there's any difference in the amount drawn.

There's no difference.

It simply stops people being confused by the air bubble in the syringe, as happens with a lot of test kits.

The whole syringe is a giant air bubble

 

[Reefer Matt]

Part 2

 

[billyocean]

Important for the alk reagent...refrigerate and shake before each use. This will ensure longevity and accuracy IME.

 

[Reefer Matt]

Important for the alk reagent...refrigerate and shake before each use. This will ensure longevity and accuracy IME.

I like to swirl it every time. Have never had a problem. Good tip, thank you.

 

[billyocean]

I like to swirl it every time. Have never had a problem. Good tip, thank you.

No problem! If not refrigerated the reagent tends to test differently after a bit. Not sure on exact timeline but within a month.

 

[Reefer Matt]

No problem! If not refrigerated the reagent tends to test differently after a bit. Not sure on exact timeline but within a month.

Good to know! I might as well do it, as I have a fridge two feet from my testing station.