Better light?

It isn't the most expensive light, but it's above average.

just get something that physically goes on the tank, and get something brighter than you think you need, but dimmable. and try to stick to daylight.
 
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The link looks OK, not as bright as I would personally like.


note it isn't dimmable, as far as I can tell, but decent spectrum.

note it ships from china.
 
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if you are cool with the algae, go for it.
 
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I don't think the light will cause that much, unless you are leaving it on through 14+ hours a day.

But there's more than scrubbing algae from the glass, especially if you are keeping plants.
 
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