11-06-2008, 05:36 PM
Join Date: May 2008
Location: New Jersey
| | Re: Calibrate your drop checker, CO2 is bad for fish!
Originally Posted by Squawkbert
I suspect it would be prudent for you to double check the calibration of your pH meter and the dKH of your drop checker's solution before you go off dismissing the work of numerous others on the subject.
pH controllers are only as good as their probes. If probes are neglected, CO2 delivery accuracy will suffer. If your probe gets gunked up at a pH above your set point, your CO2 tank will remain "on" until the pH drops to a certain point - which may be never, as far as your probe is concerned. You should also regularly calibrate the probe using standard buffers bracketing the range of pH values you anticipate the probe seeing. In addition to accuracy, you need to pay attention to the response time of the probe.
pH controllers are not "set it and forget it" devices.
Good advice but I don't think you have actually used a pH controller.
I calibrate my controller about every other week. I have a pocket pH meter that I use to verify my controller every few days. I also have a drop checker that I use to verify that my controller is working.
I can measure the CO2 level in my tank to +/- 2ppm.