ORP and PH following same path

[Ippyroy]

I thought the ORP would rise when PH fell and vise versa. For the last few days that is no longer the case. When PH falls so does ORP and when PH climbs so does ORP. Is this anything to worry about? Or is it normal?

 

[DC Reefer]

Only been monitoring ORP on one tank for a couple of months now but mine have consistently moved in the opposite direction.

 

[Ippyroy]

Only been monitoring ORP on one tank for a couple of months now but mine have consistently moved in the opposite direction.

Mine did that for months. Now they are the same. I thought it was normal for them to be opposite.

 

[Randy Holmes-Farley Verified Community Expert]

Mine did that for months. Now they are the same. I thought it was normal for them to be opposite.

It is.

what range of changes are we talking about?

 

[Ippyroy]

It is.

what range of changes are we talking about?

Here’s the graphs from Neptune. PH is natural. I only dose about 30 mls of soda ash via DOS.