The easiest way to do that is by turning the tank light on when you get up in the morning and switching it off when you go to bed at night.
Betta fish light at night.
Some bettas won t eat at all when stressed by too much light.
Your betta has a day night cycle it follows just like you.
So you must turn out the tank lights overnight to replicate the natural day night cycle that the fish enjoy in the wild.
Are you wondering whether you should leave your betta fish light on or off at night.
If your betta fish has too much light it can become overly stimulated and stressed.
Betta fish typically need 8 to 12 hours of light and 12 to 16 of darkness so make turning off your tank light a pre bedtime habit.
You ll see this stress play out in feeding habits mostly.
If you notice your betta is acting in an aggressive manner when the light is on then it could be because he is seeing his own reflection.