Hi all!   I'm having an issue with my Milwaulkee #SE220 probe that I'm using with a Milwaukee MC122 pH controller.  I use this in my 40G breeder, but I also use the probe to check pH in my other tanks.   The 40G is my high tech tank with high LED lights and CO2.  I just use my well water in it which naturally has a GH of 5.5 and a KH of 7.  Mixed community tank with my Bloody Marys....  They love it and thrive...   A month or two ago, I set up a new 11 gallon True A