Alright i searched RC but didn't really get a set in stone answer.

My 35g hex has an annoying green algae that grows on the glass. From what i think i understand that is a sign of a nitrate issue. Are my assumptions correct?

Im guessing a fuge helps fight nitrates as i have a mini fuge on my 20tall and dont have this issue with it. My 35g hex only has a skimmer.