Cromis cause mass death???

[stephicozar2]

3 foot tank - 120 litres
2 clowns
1 blue stripe cleaner wrasse
1 humbug damsel
2 green chromis

Up until today, 1 royal dottyback

1 year old tank
Ammonia = 0
Nitrate = 5-10
Biolife filter

I got 5 chromis the week before Christmas. I lost 3 within a week. This morning my dottyback (1 year old) was just dead on the bottom of the tank with no prior warning.

Now my humbug is looking really lethagic, not eating (I don't think he's eaten anything for 24 hours).

One of my clowns, the female, has what looks like a pimple on her chin. I've been using some fishy medicine periodically for this for about 2 months and it comes and goes.

Any ideas what is causing my tank to suddenly be so sick when I haven't had any fatalities in the year its been operational?

steph

 

[Andrew]

[welcome]

Could be a number of things. I would try to lower your nitrates also. how old is the tank? When were the fish added to the system? Were the fish quarantined before they entered your tank? keep in mind, Chromis will kill each other off over time as they single out the weakest link in the group until there is only one or two left. But it sounds like you have another problem on your hand.

 

[Pescado Racing]

Chromis virdis also carry a variety of parasites/diseases. Brook is very common within this group. I have also read they are particularly sespetible to Bacterial infections (red patchy blotches), considered contagious throughout the species.

I also agree it could be a # of things. Sorry to hear of your losses.