Our water has chlorine guys. No chloramine and i used those water conditioners. And as Cecil said they remove Ammonia too.
Here is the latest update: Since yesterday only 1 fish died and others seem all right. So it is improving. However i don't know whether it is because of my attempts to remove ammonia or putting aggressive male fish in separate tanks. Because these males are beating the crap out of all the fish there.
But i don't know until when i can separate aggressive males. Sooner or later i need them in my main FHM tank.
