Already regretting my choice....

Velcro · Dec 10, 2017

FirstContact said:
No YOU NEED to KNOW the actual value not to go over 450! Read your ozone guidelines!

What about when you use a salt that drops orp by 100 every water change... you still that your orp value means something then?

FirstContact · Dec 10, 2017

Velcro said:
What about when you use a salt that drops orp by 100 every water change... you still that your orp value means something then?

You don’t need to know because you don’t run ozone in which case your probe is a waste anyway!

Terence · Dec 10, 2017

FirstContact said:
You don’t need to know because you don’t run ozone in which case your probe is a waste anyway!

This is neither accurate, helpful, nor on topic for this thread.

FirstContact · Dec 10, 2017

It is accurate. You don’t want to go above 450 ORP when running ozone. Read Randy’s articles on ozone.

Velcro · Dec 10, 2017

FirstContact said:
You don’t need to know because you don’t run ozone in which case your probe is a waste anyway!

Not sure where you’re going with that, but here’s Randy’s take in targeting a specific number. As I said, it really doesn’t matter what the number is. You should be starting with a very low dose and watching the tank, not the numbers.

“Most aquarists do not target any specific ORP value as being optimal, in part because ORP measurement is subject to considerable potential error.”

“The ORP of the open ocean (and on coral reefs) has been reported to have values ranging from 0 to 450 mv.2-5 The fact that these values are very prone to error for a variety of reasons makes them not very useful in setting a target ORP for aquaria. These sources of errors are discussed more fully in subsequent sections of this article.”

Terence · Dec 10, 2017

FirstContact said:
It is accurate. You don’t want to go above 450 ORP when running ozone. Read Randy’s articles on ozone.

Please read the quote and my response again. It had nothing to do about what value to run ozone at. If you are looking to kick up a battle on ORP and ozone, this is not the thread to do it on.