Two random Angel fish deaths!!!

[TigerKate]

Hi everyone,
I came home last night to find that an angel fish that I had had for 5 years was dead!! As you can imagine, I was very upset! My second angel fish died over night, however my third angel fish seems to be perfectly fine just lonely now I guess!!
I checked all of my levels last night and everything was as per usual, no changes to Ph Gh Kh No2 etc etc etc, the only thing that I can attribute the deaths too is the weather. Sydneys weather has been very strange of late the temperature is anywhere between 18-31 degrees which has caused some temperature fluctuations in my tank...
Does anyone think this would kill them?
Also I did a PWC about 4 days ago, should I do another one or just wait for a few days?
Any advice would be very helpful with thanks!
Kate

 

[Zagz]

Sorry for your loss. I can't honestly guess. I doubt the temp would have caused it unless they were severe swings. Was there any aggression between them? Were they they only fish in the tank? What size tank?