discus in planted tank

[shyam prakash r p]

hi

I introduced 5 discus of approx 4" each into my planted aquarium,
i had them in another tank where I use the same water even for my
planted tank.

As soon as i introduced within 10 minutes all the fishes came to top of
the tank and their breathing slowed down immediately, they were
as if floating dead. Immediately i transferred them to their old tank
and they were fine in a jiffy

what would the proplem in my planted tank, can any of you guys help me

[goldenpigeon]

were they floating on their sides?

[shyam prakash r p]

they were floating upright

[Proteus]

Do you know what the water chemistry is on the planted tank? (pH, Ammonia, Nitrites, Nitrates, gH, etc)

How does it compare to the existing tank?

Is the planted tank a mature tank, i.e. cycled?