Um not a genius here but wondering what kind of tank/container you put the fry into? (ie. was it too big and chilly?) When SnowyAngel still lived here there was never a problem with putting the fry into whatever clean clear containers we had, even well washed 1 gallon plastic candy buckets from the cinema where she worked! Glass bowls worked fine too. There was lots of surface area, a desk lamp for a heat source and everyone seemed to thrive just fine on powdered fish flakes. They sure are adorable when they're so teeny. If the temperature is the same and the water(of course, DUH) is dechlorinated, I admit I'm puzzled as well. Any brainiacs out there?
SnowyZMom B)
ps- the little suckers sure learnt who provided the food fast too. I'm presuming, again DUH obviously, that you were feeding them frequently, a little at a time? Ours learnt to beg right fast! Where their tummies are concerned they aren't dumb fish.