Testing ORP

[gman2]

I just replaced my ORP probe after a few years on my Neptune Controller.

I really dont monitor it that much, but I have the feeling its off. Is there a solution out there that I can just put it in to compare values.

I know that to calibrate it you need to use quinhydrone (or something like that), but have no idea where to buy it.

Any suggestions??

Thanks
Tony

 

[Anonymous]

Typically the place where you got the probe from sells the solution. If not, check out the equipement webpage, other reef hardware store, and scientific warehouses.