Title: Pointless
Product review: I thought this would be great but it turned out to be pointless. It changes color at a single degree so if it is purple the water appears to be too cold but one degree later, if it turns pink the water appears to be too hot. It is impossible to have the water stay at exactly the one degree that will make the disk stay half purple and half pink like the instruction suggest. We were much happier with the little yellow and green turtle thermometer that beeps if the water gets below or above a reasonable range.
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