Oh right ok, that could explain thw high resultNo, it’s actually when it turns lavender, not pink, the instructions do show pink but there was an extensive testing on this and lavender is the correct stopping point.
First post in this thread explains.
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Alkalinity titration endpoint pH & Salifert endpoint color
TL;DR: The endpoint pH is 4.41, and the endpoint color is that "lavender" color I've been telling people about. Over the years, there have been many threads on R2R and other forums debating a couple of basic details relevant to testing for alkalinity in reef aquaria. One of the most...www.reef2reef.com
Thanks