"Kate" wrote in message
...
has anyone ever heard of fish being poisoned by fertilizer tabs? How
about
hygro of swords being harmful to lemon tetras? I'm just trying to
eliminate
my plants as the sudden cause of death for all three of my two year old
lemon tetras.


What changes did you make to the tank recently? I'm assuming by your
question that you've recently added fertilizer. Were there other changes?
How much, and what type of fertilizer did you add?