Toxins with ozone use.

Flameback Pair · Nov 9, 2015

Randy,

Some time ago I read an article you wrote about ozone use in our reefs. If I remember correctly ozone dosing requires a follow up of more activated carbon use than what is usually required to adsorb a toxin coming from a reaction of an oxygen ion with something in saltwater. What is this toxin and how do we test for it?

Randy Holmes-Farley · Nov 9, 2015

A chlorine test works for this purpose, even though it is not actually chlorine we have present. I discuss it here:

http://reefkeeping.com/issues/2006-04/rhf/index.php#16

and give background on the toxicity here:

http://reefkeeping.com/issues/2006-03/rhf/index.php#15

and the results of this test in my tank here:

http://reefkeeping.com/issues/2006-05/rhf/index.php#12

Eckolancer · Nov 9, 2015

Is there any issues with using sodalime that you have seen?

Randy Holmes-Farley · Nov 9, 2015

To do what?

Eckolancer · Nov 9, 2015

Just wondering if using it to remove c02 which in turn causes a higher concentration of clean 02 would have any side effects. Kinda like with the use of ozone

Flameback Pair · Nov 9, 2015

Randy, in the articles above, you mentioned to provide more commentary on this subject "next month," can you provide a link to this?

Randy Holmes-Farley · Nov 10, 2015

powers2001 said:
Randy, in the articles above, you mentioned to provide more commentary on this subject "next month," can you provide a link to this?

The three articles above were published on 3 consecutive months in 2006. So that "next month comment in means the second or third article.

The only update I have is that I've stopped using ozone and the type of GAC I was using then. A few years after setting up ozone on the tank described in the article above, I decided to stop ozone out of concern over HLLE-like issues in two tangs.

While I also changed GAC brands (for the same reason; switched from Marineland Black Diamond to BRS ROX 0.8 ) and cannot be sure which did the trick, and the tang I have now is a different one, the HLLE disappeared. So I no longer run ozone 24/7. Once every few months I run it overnight at a low dose to clear the water, and then shut it back down again.

Randy Holmes-Farley · Nov 10, 2015

Eckolancer said:
Just wondering if using it to remove c02 which in turn causes a higher concentration of clean 02 would have any side effects. Kinda like with the use of ozone

No, I do not believe that removing CO2 would have any of the effects that ozone has. It also doesn't change the O2 concentration noticeably. O2 is about 20.95% of normal air and CO2 is only 350 ppm. So removing the CO2 completely weill only boost O2 to 20.97%.