Diddo. I had 5, 2 died within a month, then a third developed a big tumor on its tummy and started swimming "sideways", so i put it to sleep in some ice water for over an hour Let the water warm up to make sure the fish was gone (it was) and gave it the one flush salute.
Does that seem to be the most humane way to put a fish to sleep?
I've had my current 2 neon tetra's for almost a year, and both are very healty. One is definately the alpha though. My mom used to buy them by the dozen when i was a kid. they were constantly getting stuck in the filter. so much so that my dad ended up putting plastic screening around it... and even THEN,t hey'd still get sick and stick to the mesh. I think once tetra's are established, they're quite hardy... but they don't like shocks.
... any one know what that tumor was? it was very silvery, and about half the size of the fish. It was in its tummy, towards the front of the fish, and off to the side slightly. I thought maybe it was pregnant, waited a week and couldn't bear to watch it suffer.
I still love neons though!