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dwsindy
11/27/2006, 07:40 PM
What brand of PH meter does everyone use and how often do you calibrate?
bpd964
11/27/2006, 07:43 PM
milwaukee sms 122

I calibrate every 6 months or if Its out of the water long enough to dry out.
Billybeau1
11/27/2006, 07:44 PM
Pinpoint.

every 6 weeks or so.
mg426
11/27/2006, 08:39 PM
Pinpoint here About the same 6weeks to two months