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re: bject: [APD] cheap pH meters!

Hiya...

I'be been using one of these PH meters for about a year. Here are some of my observations on it:

#1 Youi can find them on Ebay for about $20-25.

#2 You should calibrate them with standard PH calibration solutions maybe once a month or so.

#3 They do a decent job.... but make sure when you are taking a reading that you are at least 12 inches or more from your lighting hood. Ideally, take a water sample in a clean cup and make the measurement awayt from any light hoods or powerheads. For the longest time I was having problems with the PH value drifting all over the place when taking a reading at the tank top. I talked to tech support at Hanna Instruments and we determined that the problem went away when I turned the CF lights off.

I have compared the measurements against the lab-grade PH electrode attached to my Hanna PH controller and they correlate well as long as you do at least a monthly calibration with PH standards.


Regards

Lorenzo Rota
Santa Cruz, California


Message: 2
Date: Tue, 23 Mar 2004 11:23:54 -0700
From: "Nick Andrews" <nicothefabulous at hotmail_com>
Subject: [APD] cheap pH meters!
To: aquatic-plants at actwin_com

Forget those PITA test kits for pH. Check this out:

http://www.omega.com/ppt/pptsc.asp?ref=PHH7X&Nav=grebb01

Nick A



Message: 11
Date: Tue, 23 Mar 2004 18:45:55 -0800
From: "Mark & Peta" <mbethke at socal_rr.com>
Subject: Re: [APD] cheap pH meters!
To: "aquatic plants digest" <aquatic-plants at actwin_com>

WOW, that;'s a real good price. Sounds like an accurate solution to them
high priced units. Good find Nick, Mark
----- Original Message -----
From: <revance at indiana_edu>
To: "aquatic plants digest" <aquatic-plants at actwin_com>
Sent: Tuesday, March 23, 2004 10:43 AM
Subject: Re: [APD] cheap pH meters!


> Quoting Nick Andrews <nicothefabulous at hotmail_com>:
>
> > Forget those PITA test kits for pH. Check this out:
> >
> > http://www.omega.com/ppt/pptsc.asp?ref=PHH7X&Nav=grebb01
> >
> > Nick A
> >
>
>
> That's pretty inexpensive... however I don't understand why you would have
a
> resolution of 0.01 when the accuracy is only +-0.2. Seems to me thats kind
of
> misleading.
> _______________________________________________
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
> http://www.actwin.com/mailman/listinfo.cgi/aquatic-plants
>



------------------------------

Message: 12
Date: Tue, 23 Mar 2004 21:53:06 -0600
From: "Kevin Sheller" <kevmo at arenafan_com>
Subject: [APD] Madagascar Lace bulb
To: <aquatic-plants at actwin_com>

I just extracted my madagascar lace from my 75g aquarium. I'm giving it
away. It's the long-leaf variety. (It's on the right side of this picture --
http://www.aplants.com/75g/DSCF1607-cropped.jpg) Send me your address and
I'll mail it out to you by Wednesday morning. If you have something cool to
give me in return, great. If not, no biggie.

First come, first serve, before 11am Eastern Time on Wednesday morning
(3/24) if you write to me after that, you won't get it. :)

Please keep "Madagascar Lace bulb" in the subject so it doesn't get lost in
my junk mail...

Kevmo



------------------------------

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End of Aquatic-Plants Digest, Vol 7, Issue 66
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