Green and black algae

I have a lot of green and black algae growing in my coco mat medium
comming down the home streach. The ladies look good but i dont know how to get rid of the dam algae

eliminate any light going to the water , cover it up

use a low dose of hydrogen peroxide in your res with you nutes it will nutralize the algea just becareful and do a test first bucause to muck h2o2 will bleech and burn your roots. it doesnt take much to accomplish.