well thanks for all of your help i really appreciate it, i think i just shocked them. :-(. i won't let it happen again, hopefully my molly recovers.... thanks again
If it says that, then that's not the problem, as far as chlorine/chloramine goes. You put the proper dose in the water for the full amount. You want to dose the tank, not the replacement. In other words, you may only take out 50%, and put back 50%, but you dose it for 100%. 10 gallons, not 5.
Please, can you tell us what the ammonia and nitrite readings are, because these can be causing the distress.
well my red eye fish that died did seem to be gasping for air and didn't want to got to the bottom, my molly is now at the bottom of the tank and is looking a little better