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#2
August 20th 06, 07:01 PM
posted to rec.aquaria.marine.reefs
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Dupla ph control HELP!
"Arjan Bakker" wrote in message ...
I think I figured out how this works, but when I try calibrating with PH4 I cannot get the PH control below PH5. I must be doing something wrong! Maybe your sensor/probe needs replacing ? Or the buffer is old and not exactly at 4. 
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