green slime

bullitt21

Reefing newb
i am getting green/brown slime with bubbles.what is this?i went away for a week and my skimmer mest up and my salt level went way down.everything is still living but my rocks are covered in crap.any help?
 
Sounds like cyanobacteria.
Up the water changes,cut the lights off for 3 or 4 days,siphon out as much as possible,and run a good GFO.
 
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