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#1
August 20th 06, 01:40 PM
posted to rec.aquaria.marine.reefs
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Dupla ph control HELP!
Hello, I bought a second hand "Dupla ph Control" (old type), ofcourse without a manual. 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! Can anyone help me get a manual for this control, or does anyone know what i'm doing wrong? Regards Tamara 
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