Last week I put a green bean in the tank for the twigs, they love them but overnight, one glass cats went pale and was flopping on the bottom, others were a tiny bit opaque but acting normally. One glowlight tetra was dead on the bottom and the others had red in the gills and were gasping. No twigs seemed to have touched the bean.
Took the bean out in the morning and did a huge water change, everyone looks fine now, no red gills, glass cats are clear again.
All I could think of was that there was something on the bean?? E. coli, pesticide, herbicide?? Didn't eat the rest of the bag, chucked out the whole thing but noticed that they seemed a bit wet. Smelled normal, no funny colours.
