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Old 01/25/2014, 08:37 AM   #60
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Join Date: Mar 2013
Location: Central NC
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One other thought about this; if you're using a general-purpose, programmable controller to run a calcium reactor, you don't really need a continuous-duty, adjustable peristaltic pump. You could just as easily use any peristaltic dosing pump, you simply control the calcium/alkalinity additions to your aquarium by adjusting the on/off duty cycle.

That will result in pH swings in the calcium reactor, but so what? If you're using a pH probe and a solenoid valve to turn the CO2 on/off, that won't cause any issues, the controller will just turn the CO2 off once the pH drops in the reactor and until the next "on" cycle of the peristaltic feed pump.

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