Works exactly as described. Very easy to set up. No more checking the pH several times a day. Set and forget. Just calibrate when he speaks. This article has improved my quality of life. It just works. I fill the tank with fresh reverse osmosis water and the Bluelab pH controller fixes the pH for an hour. Manufacturers, stop wondering if this works. It does. It's worth it. Green light does not harm plants in the dark cycle. I upgraded my system to 5.8 and it stays there. Love it.
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