comet fish eyes glazing over

Question
my comet fish's eyes glazed over with like a thin film of cotton wool then it died, now I am really worried as another ones eyes have glazed over, can you help?

Answer
Hi Amanda,
 Have you been doing regular weekly partial water changes?  You should be changing about 20% of the water once a week, every week to keep your fish happy and healthy.

 This is in addition to having a proper filter on the tank.

-- Ron
  rcoleman@cichlidresearch.com
  Cichlid Research Home Page <http://cichlidresearch.com>