No Need for this Ira... you should know better. 
Sexual Reference Removed 
Mod 
Bill. 
 
Have the tank somewhere around 22°C  The angels will be a little cooler than perfect, but will be fine.  The goldfish will be a little warmer than perfect, but also should be fine.  I've forgotten to plug my heater in one of my tanks after a water change for 3 weeks over winter and only noticed when I went to do a long overdue water change that it was freezing cold.  Tank was at 16°.  No deaths, no sickness, everyone was fine.  Fish don't drop dead the instant the temp gets 1 degree away from their perfect temp.