Yes I added them a week ago. At first, it was just the little one showing small white areas but now its the 3 of them. The 7 tetras are showing not symptoms for now.
About the Corys being scaleless fishes I found this thread...
Thanks for the quick response Rocky!
Ammonia is 0, Nitrites 0 and Nitrates 0/10. PH is between 6,8 and 7. One of them have also a white spot in the head.
Two days ago I added one dosis of Seachem PolyGuard when they started showing this white thing but the Corys where in absolute shock (Tetras...
I have this three Panda Corys in a 20 gallon tank along with 7 lemon tetras. The 3 corys started showing this white fuzz all over their bodies. They are eating and active when I feed them but must of the time hiding. The tetras are not showing any symptom.
Water parameters are correct. What can...