It's not her numbers that are the issue but the instability in her numbers over time that is most likely causing a lot of the issues.A water change would be the best way.
But really,your numbers aren't that terrible.
The corals on the other hand don't look too good.Did the alk spike high before dropping to the 10.8 dkh?
It spiked to 17.2 dhk before dropping
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