In less-happy news, one of our tiger barbs died last night. Despite numerous warnings from people at the pet store about how vicious they can be when housed with tetras, they were the most skittish, scaredy-fish I have ever seen in my life. They were intimidated by anything that was even a quarter their size and could move. But they were also the biggest and oldest fish in the aquarium. We're now down to one very skittish and lonely-looking tiger barb (among several other tetras, rasboras, and danios), who I believe is the only one still living out of the first group of fish that I bought 2 years ago.