Covering the tank

[Gylie]

New fish keeper here. I'm a student and most of the time I stay up late, but I'm worried about my fish not getting enough darkness/rest. He's a betta fish in a 5gall planted tank. Should I cover the tank with a towel at night to block out light or does that usually stress fish out?

 

[KaylNeko]

I'm usually up til 1 or so, but 3 isn't unusual. The aquarium timer lights are on automatic, so the tanks are mostly dark once they go off. Haven't seen an issue.

 

[LyndaB]

Unless you have really bright light directed into his tank, you should be fine. Ambient light doesn't seem to affect their rest cycle.