Algae growing on my Archer?

Melbell

Feeder Fish
MFK Member
Oct 3, 2013
176
0
0
Hawaii
I have a burmese clouded archer in a planted tank, medium lighting, low light plants, and no co2... I noticed his tailfin looks like its becoming that green/brown algae color (it was clear before), it doesnt seem like a natural color.

Could this in any way harm him? Should i get a weaker lighting system?

uploadfromtaptalk1385430363904.jpg

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