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shalu · 04-12-2005, 04:14 PM

I use a sump wet/dry. Initially I had the probe in the sump along with CO2 reactor. My solenoid would go on/off very frequently because the probe is too close to the CO2 rich outlet. So I moved the probe to the overflow prefilter. Sounds like you don't have that problem. Still, I suspect your calibration might be off, it is easier to drop ph initially when CO2 is low.

04-12-2005, 04:14 PM	#8 (permalink)
shalu Senior Member Join Date: Oct 2004 Location: San Jose, CA Posts: 323 iTrader Ratings: 0 Plant Points: 3600	I use a sump wet/dry. Initially I had the probe in the sump along with CO2 reactor. My solenoid would go on/off very frequently because the probe is too close to the CO2 rich outlet. So I moved the probe to the overflow prefilter. Sounds like you don't have that problem. Still, I suspect your calibration might be off, it is easier to drop ph initially when CO2 is low.