Your calcium went up because corals and ther animals stop calcification once you get below 7 so since the animals stopped using it and the calcium doser was still going it went up , it will fall naturally ver the course of the next two weeks once alkinity is back in range and the animals start using it again.
Something is fishy with your Alk numbers what do you dose and how big of a tank? 150 mls in one day should see a rise of a few points even in larger tanks so either the test was wrong , solution is mixed wrong or the measurement was wrong .
What do you test Alk with?
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