Very low ORP

seastar · Sep 2, 2017

Im thinking I must have a bad probe... that or something serious going on in the tank. I just hooked it up and to my surprise it was reading 43! I hooked up a micro-bubbler and it's slowly climbing up, but yikes. How was everything in my tank not dead if this was accurate? Fish seem fine, corals had perfect polyp extension.

I have dinoflagellates to start. That's might give a little background as to the following...
I have a UV filter hooked up, Im dosing twice daily h202 (3% 1ml/10gal) Wouldn't that make the number really high if anything??? I also have a Sochting Oxydaor running only 3% instead of the 6% because Im dosing and I plan on keeping it in there long term.

Any thoughts? Ph is a little low at 8.08 - calibrated today.

seastar · Sep 2, 2017

I also draw in fresh air from outside through a 1/2" tube into my protein skimmer. I truly thought my numbers were going to be on the high side.

Mal11224 · Sep 2, 2017

When you first use your orp probe, it is always low and slowly moves towards the correct number. I wouldn't worry about it. It can take over a week to adjust.

seastar · Sep 2, 2017

Mal11224 said:
When you first use your orp probe, it is always low and slowly moves towards the correct number. I wouldn't worry about it. It can take over a week to adjust.

Ah dang, total ORP rookie mistake then. OK, thanks for your help!