Danny,
It would be helpful if you could provide some information about the tank,
such as:
How long has the tank been up and running?
How long have the fish been in it?
Temperature?
pH, ammonia, nitrite levels? (also, "normal" provides an idea but numbers
help beter)
Filtration type?

When it comes to unhealthy and/or dying fish, these basic kinds of
information can provide a wealth of background for others to help diagnose
potential problems.

Nevertheless, NetMax has a quick list of potential causes. NetMax is one of
the great ones on this forum and you're sure to get reliable advice.

Fishman

"danny" wrote in message
oups.com...
hi,
my platy and 1 or 2 of her babys are hanging at the top of the tank
seemingly gasping for air but i have only recently put a new airstone
in. my other fish are fine eating normally i am giving the tank a
routene clean today, but, i had some fancy guppys they started doing
this and then died, i want to save this lot because i was loosing 1 a
day with the guppys, i dont want to loose the platys because they are
my favourite fish and they are so friendly aswell

please help,

danny