yesterday when i checked mycal it was 420. today in the morning its 500 . how did that happen . my alk is 12 and its the same as yesterday.my sump has evaporated under the line i aways want it. all i did ad was kent marine concentrated iodine. i added a cap like they said . thats all i did. and i just checked my cal right now while the lights is off, does that throw it off a little?
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