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ray-the-pilot · 01-25-2009, 06:48 AM

I use a drop checker with my CO2 controller. You can think of your controller as a thermostat and the checker as a thermometer. They verify each other. As long as the color in the checker hasn’t changed and the pH reading on your controller is the same you are under good control. I haven’t recalibrated my controller in months.

It doesn’t matter what brand you buy. I have the cheap Red Sea Checker in my aquarium.

01-25-2009, 06:48 AM	#7 (permalink)
ray-the-pilot Senior Member Join Date: May 2008 Location: New Jersey Posts: 512 iTrader Ratings: 0 Plant Points: 54550	Re: PH controller vs. Drop Checker I use a drop checker with my CO2 controller. You can think of your controller as a thermostat and the checker as a thermometer. They verify each other. As long as the color in the checker hasn’t changed and the pH reading on your controller is the same you are under good control. I haven’t recalibrated my controller in months. It doesn’t matter what brand you buy. I have the cheap Red Sea Checker in my aquarium.