Reef nutrition

Algea

Question, I have a tank running that's about 6 months old. Added two Kessil lights and now have some hard green spotty algae growing on the glass. It's really hard to scrape off. It's not hairy, but more like the purple algae. What's up? Too much light, too much food?
My fish are emperor angle, foxface, watchman goby, blue tang, sgt major, and two clowns.


Thanks
 
Sounds like coraline algae. I get the same ugly green on the front glass as well.
You are essentially looking at the underside as well, which is probably uglier and greener.
At any rate, normal. Get a good scraper. (Razor blade for glass aquarium, hard plastic for acyrlic)
 
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