HEEELP!!!!! Tempurature droped

[SwimsWithFish]

Overnight it got really cold and my fish heater doesn't have a thermostat and the water usually fluctuatetes from 76-80 day/night but when I woke up the water was 68 degrees!!! I just turned the heater way up to help but will the fish be okay?!

 

[NYgiantsRP]

you should raise the temp slowly. turn it up a little more every couple hours. its not good to shock the fish and go from 68 to 80 in an hour. they should be fine. i left my heater off for two days one time the water was around 70 and they were fine.