orp

[steve414]

does any one have or no someone that is selling an orp meter or controller was going to get one from a friend but it doesnt work
i live milwaukee wi will drive down

 

[Douglas LEHMAN]

Hello
Used ones are a crap shoot. I'd spring the money for a new one.

 

[whiirly]

I have an Octopus system with ph/temp/orp&conductivity