i don't know what is wrong with my guppy.
i have 4 male guppies and one of them, his tail fin is gone.
only like strings are left and he has changed colors.
i got him 3 days ago.
all the other ones are fine but him.
anyone have any idea as to why that happened???
you need to check for ammonia, nitrite etc-thats always the first thing to do when a fish is sick.With new fish it's often stress but it's a good idea to check the water anyway and prevent more losses.