Oh my gosh, my pH is almost 8.6!!!
![](/proxy.php?image=http%3A%2F%2Fi419.photobucket.com%2Falbums%2Fpp271%2Fpsh54%2FTale%2520of%2520the%2520Tank%2FIMG_20170120_210521117_zpsve26idpo.jpg&hash=bd59ab35a677341d015c81f325e7fdf2)
It's a good thing, as a two part doser, that I know that it's impossible for me to get to this pH unless someone dumped something nasty in my tank. I might be able to get there if I dosed kalkwasser and overdosed or dosed too fast, but otherwise, it's highly unlikely.
So I pulled the probe out and gently brushed off the few strands of hair algae, washed with RO/DI, and recalibrated using pH 7 and pH 10 standards. And now this is more in line with what I'd expect with lights out and closed up house in the winter:
![](/proxy.php?image=http%3A%2F%2Fi419.photobucket.com%2Falbums%2Fpp271%2Fpsh54%2FTale%2520of%2520the%2520Tank%2FIMG_20170120_212355743_zpsjg4hkn1y.jpg&hash=45d519c180cc9814c3f52f8a50ef3d79)
If it still didn't look right or was sluggish, I'd soak the probe in some vinegar overnight and recalibrate.
![](/proxy.php?image=http%3A%2F%2Fi419.photobucket.com%2Falbums%2Fpp271%2Fpsh54%2FTale%2520of%2520the%2520Tank%2FIMG_20170120_210521117_zpsve26idpo.jpg&hash=bd59ab35a677341d015c81f325e7fdf2)
It's a good thing, as a two part doser, that I know that it's impossible for me to get to this pH unless someone dumped something nasty in my tank. I might be able to get there if I dosed kalkwasser and overdosed or dosed too fast, but otherwise, it's highly unlikely.
So I pulled the probe out and gently brushed off the few strands of hair algae, washed with RO/DI, and recalibrated using pH 7 and pH 10 standards. And now this is more in line with what I'd expect with lights out and closed up house in the winter:
![](/proxy.php?image=http%3A%2F%2Fi419.photobucket.com%2Falbums%2Fpp271%2Fpsh54%2FTale%2520of%2520the%2520Tank%2FIMG_20170120_212355743_zpsjg4hkn1y.jpg&hash=45d519c180cc9814c3f52f8a50ef3d79)
If it still didn't look right or was sluggish, I'd soak the probe in some vinegar overnight and recalibrate.