Why are my fish dying off?

kttipton

Registered Member
Nov 7, 2005
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I am a three year veteran of marine fishkeeping. I started with 72, when to dual 125s, and just upgraded to 450 gallon. Had a good stock of fish:
Purple Tang
Yellow Tang
Blonde Naso Tang
Harlequin Tusk
Imperator Angel (very large)
Powder Blue Tang (and, yes, all the tangs got along wonderfully)
Algae Blenny
Mandarin Goby

Now, I realize the goby can be difficult to keep, so I won't go too far into his death. However, within a 3 day span, I lost my powder blue (which was quite large and one of the most active), the imperator angel (again, very large) and my lawnmower blenny (which are harder to kill than almost anything). My tusk is on its last legs and I am try ing to keep him alive as we speak (and I have had him for well over a year now).

All of my water levels are immaculate, ammonia, nitrate/ite, ph, etc. I just can't figure out what is going on. Needless to say, I am perplexed over the loss of life and the money I have invested in these animals. However, I am more upset about the fact that I have NO IDEA what is going on.

Does anyone have any ideas or suggestions?

Thanks.

KT
 
Lots of possibilities. How long since you upgraded to the 450? How did you make the move? Most recent addition to the tank? Behavior of the fish prior to death? Appearance of the bodies after death?

The most obvious things would be anything introduced to the system, so also consider activities outside the tank--cleaning, particularly. For the goby, I'd actually be more concerned--if they are established and eating, they are very hardy fish with a thick protective slime coating, and not prone to any of the more common ailments in marine setups.
 
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