Not surprised. I know from persoanl experience Purple Stylo will tolerate at least 50°. Unfortunately the use of the colloquial terms "SPS" and "LPS" as indicators of an animals husbandry requirements has led to many misperceptions about what a species/genotype will tolerate. Decades old assumptions about phosphate has also led to creating marginal conditions that makes corals very susceptable to changes in lighting and/or temperature.
https://www.researchgate.net/publica...s_to_bleaching
http://www.sciencedirect.com/science...25326X17301601
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"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek
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