algae inside lighting unit

Jul 3, 2013
34
hi, i drained 40% of my pool water to lower my cya and i noticed algae inside of the light housing unit, can someone please tell me how to remove it to cleaned before i refill. Don't know the name of the unit but i have a

24' round 11,200 galllon AG vinyl cartride filter

can some tell me how to attached my pool info to my signature, so i won't have to keep typing info. thanks
 
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