Re: Need some help after fishes died

sorry to hear about your fish... happens every-so-often, tho.

basically what happened, is that your fish were poisoned, I think,
because the small aquarium was overstocked before the bacteria that
transfers their wastes was fully established.  You can read more about
that here

http://faq.thekrib.com/begin-cycling.html

If you decide to get more fish, empty out ALL the water from your
aquarium, add more treated water and let it filter for a few days,
then go and buy some more resiliant fish, angelfish are not suitable
to start a new tank 'cycling' (see article above).  I have used danios
or mollies when cycling and have had great luck with them.

Also, maybe try and find a new fish store with a more knowledgable
staff that can help you out with things...

Hope that helps a little,

Connor