[monscine]

Quote: Originally Posted by junglegeorge12 Did you add any chems and what is the pond made of? That is a stiff drop, even for acid rain, which I would not rule out. Are there any active volcanoes within a few hundred miles of you?

I did some medication of fungus to the kois JR. As my 1st medication was success, then I did the same method to cure them but the result was out of my thought. All the kois were in quarantine tank which made of PE (I think) and lately there was no rain at all and even if there was, the rain wouldn't get to the tank directly cause I put the tank in an area with canopy.

There was volcano activities far faraway from where I'm staying. But I don't see any relation between volcano activities with what happen to my kois.