Everone died

[paulr]

So i added a fish. Yes stupid because i had to travel and left someone to watch my tank. Not sure what happened but my gf found 3 of my 5 dead a week and a half later. She said nitrates went to 10 and the rest 0. Possibly a parasite? They did a water change quick. But the last 2 clowns kicked it the next day. I think the corals are ok. Any thoughts??

 

[Mebbid]

Sounds more like a bacterial problem than a parasitic. I don't believe a parasite would kill that many fish in a week and a half

 

[Holygral]

too many unknown to determine anything, tank history, tank mates, water parameters, acclamation process, ect.

 

[Ugzy]

Did they use water conditioner during the water change? If they used too much that would explain the rapid deaths?