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Charlie Davidson
10/04/2007, 07:06 AM
I saturated limewater allways the same PH? Like 11.7 (something like that)
I have 2 meters, live in boondocks, one reads 8.7 on my tank and the other reads 8.1. So I am looking for something (normal household item ) than has a known PH..
What about white vinigar?
Drain-O ? :lol2:
Billybeau1
10/04/2007, 10:41 AM
The only household product i've heard of is borax. I've never tried it myself. Here is the article

Borax for pH calibration
http://web.archive.org/web/20021015005420/www.animalnetwork.com/fish2/aqfm/2000/feb/bio/default.asp

You may just want to order some Pinpoint 7 and 10 calibration fluids online. Many stores sell them and they are cheap.
bertoni
10/04/2007, 04:18 PM
The borax solution is a reasonable sanity test for a pH meter, in my experience. I wouldn't try to calibrate a meter with anything other than calibration solutions, though.
JESUS VILLASEŅO
10/04/2007, 04:37 PM
use calibration solutions in closed bags. they are very reliable.
JESUS VILLASEŅO
10/04/2007, 04:38 PM
use calibration solutions in closed bags. they are very reliable.
Charlie Davidson
10/04/2007, 06:18 PM
And those are found in every household , I believe :D
MCsaxmaster
10/04/2007, 11:03 PM
I'd get calibration solutions. Most anything else isn't going to be even worth messing with.
Charlie Davidson
10/05/2007, 05:53 AM
Yeh, cal. solutions are nice-- Guess they with have to become part of my " household items" :D