Based on your remark that your fake plants were pearling as well in another thread, I'm guessing you're seeing the effects of a water change (happens to me all the time)... But it looks very similar.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry