PH monitor calibration.
 

Just wondering how often I should calibrate my pinpoint ph monitor? I've had it running 24/7 for about 6 weeks. I did a small water change tonight and put it in the fresh salt water out of curiosity. It seemed high so I checked it with the calibration fluid. It was .14 too high. Does this sound normal for the initial use?

PH monitor calibration.
 

I calibrate mine every couple months or so. Seems sometimes they wander bad and other times they dont. :confused:

Of course as the probe ages, it gets worse.

PH monitor calibration.
 

Thats one of the items I'd put in my "shouldn't have bought file"! I never trust it and always end up checking my ph the old way! so it really doesn't do me a lot of good!

PH monitor calibration.
 

As a quick test you can mix a small borax solution and it buffers to pH 9.2. Anytime I think the reading isn't right, I mix a batch of this to test it. Recipe available if anyone wants it.

PH monitor calibration.
 

Since I work in Pulp and Paper mills, I know pH is the most fequently re-calibrated equipment. Most mills do critical measurments weekly if not sooner.

Lee

PH monitor calibration.
 

Reef Raf,

What's a borax solution? :confused: Some how it sounds like something that shouldn't get near my tank.

PH monitor calibration.
 

Borax is washing soda. Brand name is Twenty Mule Team and it can be used in combination with baking soda to raise your alk. Mixing it in purified water gives a pH of 9.2. Perfectly safe even if you splashed some in the tank. I'll post a link to Craig Bingman's article about it.

PH monitor calibration.
 

Here is the link

http://www.animalnetwork.com/fish2/a...io/default.asp

PH monitor calibration.
 

Thanks Brad. I was trying to find it to post.