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Leave the light on during daylight hours, and turn it off at nightime.

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Q: What hours should you leave the light on for fish?
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it doesn't it gives the fish nutrients that only the light can give it should only be on 6 hours the max


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When should the light over the fish tank be on?

You should be aiming for between 8 and 12 hours. about the same time as the sun is up. this helps with the natural environment of the tank, the plants will grow nicely, there wont be loads of algae everywhere, and your fish will behave more naturally. this can obviously be adjusted to suit when you will be looking at the tank, after all your paying for it :P. I have mine on around 11am-9pm because this is when im most likely to be home! too light can lead to an algae bloom and make your tank go green, if this happens don't leave your tank on for so long. it might also help to keep natural sun light off of the tank. tom :)


How long can you leave a fish in the bag you buy it in before it dies?

up to four and a half hours


Do fighting fish like light?

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If you bought a fish from a store that has lights on 24-7 should you put a light on the fish at night?

No. In pet stores the fish do not have lights on 24/7 as you said anyway, Fish do not have eyelids so they cannot shut their eyes to sleep, this means they need pure light to see and pure darkness to sleep. I keep the light on for something like 6-9 hours per day and leave the light of at night so my little fishee wishee's can get some sleep. Its good for the tank to look pretty as with the lights but just think; if you had to try and sleep with lights beaming down on you?? Hope this helps ........................................................................................................................................... also if you have an aggressive fish (like i do) ex Florida gar fish, piranha or Oscar leaving the light on 24/7 can irritate them and actually make them more aggressive


Do you keep light on in fishtank?

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Is it okay to put a lamp above your betta fish tank?

i would not in case it were to fall over or if the tank would get tooo hot use a fish light 4 watts per gallon and leave it on for eight to four hours a day Bettas should have a heated tank (78F) and a close fitting cover to keep the air warm and damp so they can breath it easily without damage to their 'labyrinth'. A modern low wattage lamp should not provide too much heat. A light is good.


Should my beta have a light in its tank?

a light might be nice but its not expected for the fish to stay alive.


Can a fish tank light be on all day and all night?

In the tropics, days and nights are of approximately equal length so 12 hours on and 12 hours off should be OK. For coldwater fish there can be more variation but i would advise that lights are not left on for more than 15 hours otherwise you are more than likely to have algae problems