I agree with NetMax; check the water parameters from your LFS where you get
your Neons from, and match them, then slowly bring them to that of your main
tank. I suspect the usual pH in the LFS would be in the 7.2 range; from 7.2
to 6.0 or less is a huge drop. When I buy new fish, I always ask the shop
for their water parameters, and try to match them as closely as possible in
a seperate tank, then bring it to what I need before adding the fish to the
others. That's a pretty low carbonate hardness; is that from your mains, or
are you doing something to soften the water?

Cheers,
Poe

"Joseph Thomas" wrote in message
m...

PH 6.0 (possibly lower), KH 1 degree, GH 1 degree
Temp: 82 F