Do assist in helping me with my cardinal tetras

[hzw]

Currently my cardinal tetras population are decreasing daily with about 5-7 death per day.

My cardinal tetras have their colour faded in the middle section and some even have their tail fins disappear.

My aquarium dealer has advise me to maintain a temperature of 30 degree and add some anti fungus treatment.

However fishes death still persist even after that.

Do need ur kind advice.

Thanks:crying:

[Regional]

Did you add enough water conditioners?

Prior to the death of your tetras, did you add in any fresh tetras into the old batch?

[hzw]

Yupz, added some running nose and green tetra and the death started

So far abt 100 + has gone,

They have stop dying and it back to normal

zz

[Regional]

Okie, pls stop adding new batches again as we do not know the LFS's tetras tank are safe / similar temp / similar pH, etc.....