ORP test?

[spykes]

hey randy i have just aquired a ORP probe that needs adjustment, is there a solution home made that i can use to calibrate the ORP probe to the range that is right?

[Randy Holmes-Farley]

I do not know of a homemade solution. You need a commercial solution. This article talks about them:

ORP and the Reef Aquarium
http://reefkeeping.com/issues/2003-12/rhf/feature/index.htm