Black Alage on plants

[freddie]

I have a black alage on my amazon swords. I have 2 t5 bulbs 39 watt a piece on a 40 gal. How do I get rid of this .My light stays on 10 hours a day, no direct sunlight
Thanks

[Cliff]

Have you read through the sticky on algae (linke below). It has some good ideas on what you can do

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