No it does effect anything. Just keep your probes calibrated. I personally have'nt had the best of luck with American Marine products. 2 wireless thermometers, ph monitor, orp controller all starting acting up within a year of use. My seperate ph controller hooked up to my calcium reactor started acting up and would'nt keep probe calibrated so I switched over to a Milwaukee controller. I know use the AM controller as ph monitor just so my media wont melt in my reactor. Sorry this all sounds confusing, but your answer is at the beginning of my post. Hope you have better luck with your AM products than I did. To add: the warranty was always good to me.
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