So exactly how did they warm the water? Was it a drastic movement in temperature? Usually fish swimming at the surface can signify low oxygen levels. The dryer can also vaporize surfactants which enter the FT and damage your fish as well.
As the temperature is that low, i told them to stop feeding them (as they wouldnt eat it anyway). I guess that the swing of temperature is around 4C (from 15-19C) when they added the warm water (took 10l of hot water and add to the system)...which is a very rapid temperature swing.Water is non chlorinated.
As it is so cold, it doesnt make much sense to add warm water, because the temperature would drop back to 15C in very short time.
The dryer is vented outside, but after washing it is very humid in the room, also a strong smell of the detergent. I told them to cover the tank now.
I thought, if the cold water temperature would be the reason for the dead fish, then all fish must have been affected, all must have died. As well as for the Ammonia/Nitrite/Nitrate, at that low temp. the bacterias wont work efficient enough and im pretty sure that levels of ammonia and nitrite are high. But again, it would affect all fish. right?
I really hate it to sit here and cannot do anything about it. I have 30 tilapias left now, and i really want them to be alive when i come back home :(
Okay, maybe this was mentioned already and I'm just missing it but have you tested your ammonia/nitrite/nitrate levels? And your pH? What's the scoop on your water?