ph-203 Digital PH/ORP Controller

[nutx]

wah....looks like alot of 'kancheong' people playing with the probe and ozoniser.

be careful not to stir-fry your live stock hor.....better dun play guessing game with your probe and ozoniser...let it stablised...patient is part of this hobby....just like u need to cycle in your tank when first started...

Originally Posted by nutx

wah....looks like alot of 'kancheong' people playing with the probe and ozoniser.

be careful not to stir-fry your live stock hor.....better dun play guessing game with your probe and ozoniser...let it stablised...patient is part of this hobby....just like u need to cycle in your tank when first started...

Fully agree , this hobby must involve lots of patience , r u a patient man ?

[nutx]

bro, u asking me.....depends lor..

Originally Posted by bonjour2

Fully agree , this hobby must involve lots of patience , r u a patient man ?

Originally Posted by nim75sg

You can set the orp controller at 350 ..

Bro, the setting of ORP controller depend on how stable is the probe.
Like my probe, it never goes beyond 346 (but my Milwaukee shown 410 ) when I reduce my dosage (off the ozone), my milwaukee shown 386, my PH-203 shown 342...

So, setting 350 in Sherman's tank make sense as his probe can read 380+
My probe will not even pass 348 .

Bros using the PH-203 need to do you own judgement if you can't 'wait'.

I don't think my probe will move far..so I have to further reduce my ORP to stop at 338 today..Will have to monitor next day reading again.

Today, I have decide to Trial my Hailea Ozone.


So, I have set my PH-203 ORP to stop at 340 yesterday. My Milwaukee reads 400~410 today. Since stable as that.. I think I shall stop my input any further.

My advise to all is that if your probe is like mine always stay betwenn 300~350. Your mV reading could be quite high (400+) in your tank instead as probe sensitivity can be +/-40 .

Do take care and always goes "small"..

Happy Reefing..

Just found out that the probe (US James Broadley ) I am using happen to be a Lab Grade Probe this evening. Dipped into the Standard Soln 475mV register 460mV , so no doubt abt its accuracy, compared to China Probe , register 495mV... will monitor closely...

Can I change the probe to some other brand like aquamedic? Wonder will it fit into the PH-203

Sure as long as the probe has a BNC connection ...

Do a test on the ORP probe with bonjour2 tonite.
We use a 475 mv solution and the ORP probe read 476mV.
Very accurate leh

Regards
Sherman

Originally Posted by sherman

Do a test on the ORP probe with bonjour2 tonite.
We use a 475 mv solution and the ORP probe read 476mV.
Very accurate leh

Regards
Sherman

This goes to show that the quality is there....some deviations is expected from the test soln value due to temp compensation, but if -+ 2 mV is very accurate liao...