ORP probe

[Shawn_epicurious]

Great. In the meantime, here's an article of mine on ORP:

ORP and the Reef Aquarium - Reefkeeping.com

I read that article the other after you suggested it : )

 

[Shawn_epicurious]

I don't consider a higher ORP necessarily desirable, but I'm curious in your graphs exactly where water changes took place.

Many folks note that their water changes drop their ORP due to low ORP chemicals in a salt mix.

You were right... of course. : ) water changes do indeed have a sporadic effect on ORP. The graph I posted just allowed me to argue from ignorance lol