- You find the automatic timers in the home improvement section. By the replacement light switches/nails & locks.
There should be 3-4 different automatic timers for you to choose from. (Decide if you want 2 or 3 prong timer.)
You can use extension cords on the timer, but it will turn everything OFF & ON that's connected to it.
Aquarium equipment for bettas usually don't EXCEED 1875 WATTS. (Rarely do they even exceed 75watts total)
As long as everything connected to the timer uses less than 800 watts of electricity, it should pose NO fire hazard.