02-11-2010, 03:37 PM
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It's a botanical thing. When the plant is "disturbed" by some change, it melts. Once the change has occurred, which is before the plant begins to melt, it is a done thing. Crypts just don't like changes of any sort. Now, having said that, they are sometimes the opposite. I've had them go through uprooting for a move (houses), several hours in cold weather as well, be planted in the tanks 2-3 days later...and not a single meltdown. But I've also shifted them over a couple inches in the same tank, and meltdown 1-2 days later.
Recovery can be a couple days, or weeks. Longest recovery time I have come across was just over a year.