ps9 said:
Another one bites the dust... kid came home, ran directly to the tank, and saw the cherry barb laying sideways on the gravel. Several calls of "wake up Rosy!" went unanswered. Bagged and tagged another one. :'(
They might have already been sick at the store but 48 hours is too soon. Next time, try bottled water (not distilled). I noticed the previous post about tank set-up mentions that tap water was used to fill it. Perhaps the PH level, chlorine, etc. were too much for the fish. My fish, who I posted about that died recently, always had bottled water in his tank. He lasted over a year and a half. We switched to his bottled water after a previous fish before him only lived a week on tap. It worked without having to really do any fancy testing or anything. I think you will have better luck. I hope this helps.