Dying fish

[avilla]

My tank has been up and running for several months. The fish I originally purchased, yellow tang, damsels, puffer etc. are all still alive. However all my new fish from various pet stores keep dying. All my test results are good. Any thoughts as to what is going on?

 

[sfoister]

What's a good test result. Tell us what you're getting. The fish you got originally could have adapted to deteriorating water parameters but any new arrivals can't handle the sudden shock of bad water quality. That is just one theory...
How are you acclimating? What fish died? Could diet be an issue? What are you feeding them? Some fish require certain foods. We'll be able to help you more with all of this info.
Also, tell us how they die. Any obvious blemishes? Just sudden death? Acting a certain way?

 

[nicetry]

What fish have died? What parameters have you tested for? Can you post the reaL numbers? Saying they're good doesn't say too much as certain fish might be sensitive to varying degrees. Tanks size? What all is in there now?