Algae or ?

tcat

Silver Supporter
May 30, 2012
1,787
Austin, TX
Pool Size
17000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
CircuPool Edge-40
Areas in my skimmer and jets have turned brownish gold over the years. Removing one of the jets (attached) you can see the discolouration. It wipes off the ball, but not some other areas. Could this be dead algae?
 

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