Ozone w/o ORP Monitor

el aguila

el aguila

New member
I have about 400G in my system. I have had a Certizon 200 Ozonizer sitting around for a couple of years and thinking of putting it on a DIY Ozone reactor.

I have also had a ton of money go out lately - vehicles, septic system, heat pump, and thus do not have much extra cash.

Presently have an older Neptune Jr which has been adequate for my needs. However if I start using Ozone, I really need to get a better controller - which I'll need to wait for a while to do.

Without getting myself into trouble, I would think that I could put the Ozonizer on a timer. For example 30 minutes on - 3 hours off.

Does anyone out there know approximately what percentage of the day their ozonizer is on? Please also list size of Ozonizer, delivery method of ozone, and system info.

I fully realize that different Ozonizers, delivery methods of ozone, and system size/makeup will affect the amount of Ozone delivered to a system. My idea is to look at the data, try to figure out a baseline to maintain proper ORP levels, and then stay about 50-60% below this until I can get a new controller.

Any info will be greatly appreciated.
 
I have a Red Sea Ozone generator with built in redox controller. I run one redox probe to the return from the sump, and monitor this with my Neptunr controller.

I have the second redox probe ( from the Ozoniser ) close to the discharge from the skimmer, I deliver ozone from the Red Sea unit directly to the skimmer. The ozone output from the unit is variable by adjustment.

Redox in the return line is approx 420, and redox in the skimmer discharge is approx 460. Both these readings are now quite stable. I slowly upped the ozone output until I got this 40 odd differential, because it is too easy and dangerous to have huge differentials, signalling free ozone in the system, which I dont want.

I get this result by selecting 460 as the target ORP with the Red Sea generator, and it all seems very stable at 9 mg Ozone per hr.

I have always used low dose ozone for many years...and will continue to do so, despite the many other reefers who caution against it. Properly managed IMHO it is of benefit.

But like most things in our hobby...abuse it and you will crash :hmm2:

ps...system size...125 gall DT, 50 gall sump
 
Last edited:
If you intentionally run a very low amount of ozone, you may not need to monitor ORP. But if you use substantial amounts and never monitor it at all, even when first starting, is asking for trouble, IMO. :)
 
I ran ozone at first without a monitor and the inevitable happened. It was an enaly unit with a built in timer and airpump so I would just temporarily hooked it up to the skimmer's intake. First I did 5 minutes. Nothing happened, good or bad. So why not 10 minutes the next day. Not sure if I could see an effect. So why not 20 minutes the following day. Maybe the water got clearer. Things looked great, but really they always did. So I tried 30 minutes the next time. Lost all my cleaner shrimps. Two fireshrimp and a cleaner shrimp were dead when I next checked the tank.

There's pretty much no way to guess what you're doing when you first start out. Even borrowing an ORP meter for a week or two would go a long way to determining your dose. Now that I do monitor ORP with my ozone injection, I have no doubt I could pull the meter. You just need to know where you're at and how much your tank can take. Then things are pretty stable. FWIW too, some organisms are far more sensitive to it than others. I lost all my shrimp and everything else looked perfectly fine.

FB
 
I have run mine for years on continuous with no problems. It is hooked to my skimmers intake. I have 220 total system volume and the red sea 200 unit is set to 37m.

I don't trust the probes and got rid of it. They can fall out of the water, get plugged with junk, or just stop working.

I just kept slowly turning up the level till I got to the orp reading I liked then left it.
 
Randy Holmes-Farley said:
If you intentionally run a very low amount of ozone, you may not need to monitor ORP. But if you use substantial amounts and never monitor it at all, even when first starting, is asking for trouble, IMO. :)
Click to expand...

I run ozone constantly at a low level with no issues. I don't really care much about ORP.
 
My internet server was down all weekend.

I found a used Pinpoint ORP controller for not to much. I have sent money for it, just waiting on the mail. Thanks for the input everyone.

I have decided to set it up like Randy did in his second article on ozone with the 3/4" tubing and dump the water near the intake of my skimmer after carbon filtering. I like the simplicity plus a little easier on the safety side of running it this way.
 
It is safer to use ozone with a timer than a controller. At least with a timer you can control the amount of ozone use per day and when you want it to turn on. If a probe breaks and it is on full time, it would be bad news. I would rather have ozone run at night when everyone is asleep rather than inhale it while I enjoy my tank during the day. I would not go near my tank with it on. It doesn't take a lot of ozone to make crystal clear water. Even daily 15 mins of ozone will clear up the water. Orp controllers does not make it safer.
 
I'm also thinking about running ozone on my 75gal. I was thinking of the Sander 25mg version and running it low continuously. I got a controller with ORP probe, so I can hook it off to a shutoff.
But I was thinking a few different ways.
1. running it on low 24/7 with shutoff if it gets too high
2. running it on a timer (controller has that built in) with the shutoff if the ORP gets too high.
If I did option 2, for how long? I would assume at night when no one is in the living room?
 
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