Overnight death of 3 alunacara cichlids

[Jake Bailey]

So this morning i woke up to 3 out of my 4 alunacaras died at the bottom of the tank, and i have no clue as to what happened.
I can't see the 4th and i don't know where the tropheus is. Both haps are currently alive.

In terms of the tank, there was 4 alunacara, 1 tropheus, 4 corys and a plec. However, yesterday i also bought 2 baby Haps (of species i can not remember, but there are green with red, black and blue markings).
Everything seemed fine last night.

The tank is close to 200 litres, i had it all tested 2 days ago and all were at 0 (amonia, nitrite, nitrate).

Any advice would be great guys, i have no idea what's happened.

View attachment 20160616_064006.jpg

 

[Wailua Boy]

Could it of domestic abuse?

 

[Jake Bailey]

None have significant marks on fina or body, the aggression has been vurtally non existant recently

 

[Wailua Boy]

How long have you had the fish that died?

 

[Jake Bailey]

2 to 3 months

 

[Wailua Boy]

It would be unusual for a disease/pathogen to set so quickly from your new arrivals, i would lean toward a behavioral issue.

 

[Fat Homer]

Im guessing maybe also due to problems with uncycled tank... Especialy if all your readings are 0 in a 50G with a pleco inside

 

[Wailua Boy]

Im guessing maybe also due to problems with uncycled tank... Especialy if all your readings are 0 in a 50G with a pleco inside

you would think after 3+ months being set up the tank would be considered cycled tho

 

[Fat Homer]

true, could be his test kit is gone bad...

But then again, without knowing his cleaning routine i dont know??? But just throwing that idea out there based on what the OP said his/her test results are..

 

[Wailua Boy]

Seems like everyone seems to report zero nitrates, granted very hard to achieve