hi i am a new to fish keeping , i have got 8 fish in my tank got 6 tetras 2 zebra danois wanted to know as the fish live in the tank can i switch off the lights to give them a rest then put it on in the morning will this make a diffrence to them
First up no the fish don’t depend on the light at all with a few exceptions they’d be perfectly happy with just the natural sunlight they get. Unless you run a heavily planted tank I’d only leave your lights on for a max of 3-4 hours in an evening when it gets darker. If you run them all day/night not only is it costing you a fortune in energy but the fish are getting no rest period ie: night and you’re massively increasing your chances of having to deal with green water or an algae bloom.
Rule of thumb don’t turn the lights on before 5pm 🙂 and turn them off by 10pm. I have mine on timers to achieve this.