If your betta fish has too much light it can become overly stimulated and stressed.
Do you turn betta fish light off at night.
One becomes dominannt and keeps picking on the weaker one until it dies.
Some bettas won t eat at all when stressed by too much light.
You can keep female betta together but you need large tank and a decent group of fish 5 to spead out any aggression.
You ll see this stress play out in feeding habits mostly.
So you must turn out the tank lights overnight to replicate the natural day night cycle that the fish enjoy in the wild.
Basically it plugs into the wall and then plugs into your aquarium light and it switches the light off at your certain set time everyday.
Now betta will survive the night with the filter off but you are harming the biological filter itself.
What helps regulate that is buying a timer at your local hardware store that does this automatically.
If you don t want to go this route you can use alarms to remind you each day as to when to turn the lights on or off.
Yes you should turn the light off you re never giving your fish a chance to sleep if you don t keep the light 8 14 hours a day that s what i do.
And yes you should turn your lights off on a regular schedule.
And of course the answer is off.
Also a cheap appliance timer may do the trick if your bulbs don t eat up too much power.
Here is a picture of some.
And the most important things you need to remember are.
As for the filter.
Consistent light cycles that replicate daylight and nighttime reduce stress and mimic natural environments.
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.
Light timers are the easiest most effective way to regulate your fish s night day cycle.
With all due respect guppies4life ive seen you say 16 hours before when advising on light hours 8 10 is about right someone running at 14 16 as ive seen you say will more than likely cause algae problems at some point.
However just like their wild cousins captive betta fish do need to sleep at night.
Always best to leave it running.
These light timers are probably the most effective and easiest manner of replicating your fish s night and day cycle.
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.
Too much sunlight can overstimulate your betta causing stress and agitation as well as possibly causing feeding problems.