Please Help Sudden Death

[seanb]

100g tank, 0 ammonia, 0 nitrite ph 8.0 salinity 1.014
All of a sudden last week, I did a 10% water change also bleached my rocks at the time, after doing this I lost one fish then another and then another and another
Powder Blue, had a white film
Naso Tang, had spots
Green Bird Wrasse, no visible signs when died
Sailfin Tang, discoloration, no other biislbe sign
I just tried add a new fish a few days ago and he died too another naso tang, what could be causing the problem as everything was fine before I did the water change, and cleaning of the wrong
The current fish in tank seem to be doing fine
Maroon Clown Pair
Jaw Fish
Blue Tang
Six Line Wrasse
Sailfin Tang

 

[beth]

Originally posted by seanb
also bleached my rocks at the
Bleaching rocks that are going to immediately be replaced in the tank is really a bad, bad idea. More people have had complete tank wipeout do to this than I can count.
If you need to clean off dead coral heads or fake rocks, do it without the use of causitic, toxic chemicals.

 

[seanb]

Beth, thanks for the reply do you have any suggestions, on whatI should I do? Water change, Hypo etc.