Persistent Algae

Djturna4thakidz

Reefing newb
I have these green small round patches of algae that keep appearing on the glass. I have a acrylic safe algae scrubber but they are really hard to get off if they come off at all. Let me know if there is anything I can use or do to keep this type of algae off the glass.
 
Is the algae hard/crusty? It may be green coraline, which snails won't help. You could try using a credit card to scrape it of also.
 
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