Fish Dying One by One

[jrcoolt]

I have been a fish guy for many years, and this is the first time I have had this issue. My fish are starting to die one by one. Nitrite, Nitrate, Ammonia, PH, all is well. It is a 75 gallon tank.

I currently have:
(1)Bala Shark (down from 3)
(1)Jack Dempsey (Had 2, the smaller one died)
(4)Tiger Barbs (Down from 5)
(2)Acei Cichlids (Down from 4)
(1)Bristlenose Pleco (Only had one, he is fine)

I have also lost a catfish. I am thinking it may be my Jack Dempsey. He is the only thing I have done differently than I have done in the past. First time I have had any Cichlid for that matter. Any advice would be much appreciated. Thank you!

 

[Coursair]

JDs get aggressive once they hit breeding size. I think you need to decide whether he gets his own tank or you move the other fish out.

Research compatible JD tank mates, but every JD has its own idea of compatible IME


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[jrcoolt]

That's what I was afraid of. He is pretty big, so i imagine its about breeding size. Thank you for your reply!