5 fish dead in discus tank over one night

[Plecolover18]

Today I woke up with 2 of my bleeding hearts tetras and both my pelvis dead. Lucky all my discus are Alive. I did go out to Get more discus last week, could I brought in a disease. Also the discus where the only fish that ate. I tested the water and everything was normal. So what could be this weird blackout?

 

[Pleco1415]

When you introduce several fish in one tank at the same your also bringing in different types of bacteria. The fish that died could not handle all the different bacteria you brought in and that is why They died. It would really suck if you had several discus die. We're do you buy your discus?

 

[Plecolover18]

When you introduce several fish in one tank at the same your also bringing in different types of bacteria. The fish that died could not handle all the different bacteria you brought in and that is why They died. It would really suck if you had several discus die. We're do you buy your discus?

I only buy 2 discus a time thought

Discus Hans in Baltimore, Maryland