No don't treat the tank, it will make matter worse, the reason for your fish dying is because the tank is cycling, i would recommend some water changes, turn aeration up,if you have no scaless fish add some salt.
Ok will not treat tank anymore. Im currently using Wardley's Chlor Out and Tetra's Easy balance to treat water for water changes. Is this ok or Is there a better product I can use to treat the water before I put In tank? Also for aeration I have my filter of course but I already have a long Stone In the tank that give ALOT of air.
OK, so far so good. Fish seem to be doing fine. Hopefully no more problems. Also, I have been doing the water changes and tested today. The ammonia level dropped to half of what It was so thats good. Thanks again for all your help.
Just a little update on my fish....They are doing great! Water test's have been getting better and better. I have been watching a close eye. My barbs and sharks have been very active and eating normally. YAY!