So yesterday, with only one neon tetra left, looking terribly lonely, I bought half a dozen more. (The last tetra is over two and a half years old!! which is really old for a neon tetra). I also bought a new filter for the tank to replace the incredibly noisy one, that probably contributed to the deaths of the other three tetras. They're looking ok so far, even eating hungrily. If they survive for a month I'll consider getting some more small fish for that tank...
Dave2
Neons are my favorite. :-)