Hi Nell, The PFE Polar Penguins are excitedly reading your journal, looking at picks and writing to you. We discovered today that most of the coral samples lost 50%-75% of their mass after sitting in the vinegar for 9 days. Is this typical in the oceans? If so... that is really scary and I am really worried about sea life. I wonder if cold water will slow down the process? How will you find this out? Have a great day! Loving reading your journals! MB