Nothing different at all short of my reply just above. Had a somewhat large kH swing IMO and immediately noticed issuesI certainty don't see anything in your ICP analysis that would account for what you described...Something else is going on...some type of water contamination...some coral disease...Can you identify any changes made a month ago or just before?...added coral...changed salt mix...changed additive supplier....stuff like that...That is where I would start looking IMO
Rick

