Starfish wrote:

Definately a chlorine and chloramine problem.... There also might have
been way too much dust in the tank/filter and the dust got into their
gills.

Also did they use any chemicals or soap in scrubbing out the tanks?

I wouldn't expect deaths from cycle issues in the first two days,
especially with 10 fish in 100 gallons...

-D
--
"One ought, every day at least, to hear a little song, read a good poem,
see a fine picture, and, if it were possible, to speak a few reasonable
words." - Johann Wolfgang von Goethe