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Why Do Fish Need Light?


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  • Regular Member

I had my goldfish for over 4 months so far I haven't bough a light for the tank, but why do I need one??

The tank is in the living room and it gets plenty of light during the mornings... so I'm just wondering if the light is a necesity...

I'll be glad if anyone can answer

Thanks in advance!!! :D

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  • Regular Member

For goldfish they need some uv light, either from a tank light or through a window, to keep their orange coloring. I think light can also have some effect on keeping black on black goldies too. They can live without light just fine if you dont mind some potential color change (which is likely to happen anyways with fish we buy). I have a common that got moved from my tank into a big rubbermaid tub when he started bullying the fancies. He used to be orange and white, but has gradually lost the orange now that he no longer gets any uv light.

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