blue light only for fish only?

James M

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Probably but there’s no problem just running blues. They do need a dark period though
 

cracker

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King , I would think You (with a fish only) can run any color you want.
 

Halal Hotdog

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Apparently fish can't see red light, not sure if it is all species or some, but something to keep in mind. This could simulate a dark period but still give you visibility. Do you know what loves red light... Algae.
 
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KING

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Had someone argue that fish need "daylight" but i thought a bright 460nm during the "day" would be fine. Just seeing what others think or have experienced.
 

eatbreakfast

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Certain species of fish are from deeper water. The blue light mimics depth.
 

Jesterrace

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Truth is fish generally don't care much about what light you use (unless you are putting them under a powerful grow light or something like it). This is one of the reasons why FOWLR tanks are recommended to newbies or those with tighter budgets.
 

Ento-Reefer

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I wouldn't think it matters much except to deeper water species. However, I think many fishes colors can look washed out in only blue light especially reds.
 

krbshappy71

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Great question! Would love to run blue light instead, especially if it helps keep algae under control, and then just have the whites when I really want to see them. (I work full time and currently have a white light for the freshwater because it is planted. Yup, algae.)

Wait, so for fish only, would they need ANY light? As in could I just have regular room light during the hours I'm at work as long as it isn't dark as night? I have just ambient lighting from windows and patio door, most mornings we don't even need the various house lamps on.
 

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