ORP low, any issue?

[Randy Holmes-Farley Verified Community Expert]

I don’t completely understand ORP yet, but what I can tell you is that I notice mine fluctuates based on the time of day

That part is likely the pH effect. THe higher the pH the lower the ORP, everything else held the same.

along with the addition I trace elements.

That part is because many trace metals are redox active. Ferrous iron, for example, lowers ORP since it is a highly reducing chemical.

 

[Livinlocal]

That makes sense, I had an assumption it had something to do with the pH, but I was unsure.

 

[Fishfinder]

Yesterday I turned on my reactor with activated carbon and had an immediate adjustment in ORP.

 

[Randy Holmes-Farley Verified Community Expert]

Yesterday I turned on my reactor with activated carbon and had an immediate adjustment in ORP.

Thanks for the graph. It might be from the organics bound, or reducing metals attached to those organics that were removed.