11-23-2008, 01:18 AM
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#3 (permalink)
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Planted Tank Guru
Join Date: Nov 2003
Location: Burlington, NC
Posts: 4,847
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Let's say that you set the pH on the meter to 6.6. When the pH goes above 6.6, the solenoid comes on and allows the CO2 to flow until the 6.6 pH is reached again.
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