I'm not sure. I picked up a new T5 light last week (white 10k) as mine are now 8 months old, read that as lights age, spectrum changes and this may cause algae issues. I have not changed out the light yet however. The LED's were added in August once I started corals. I set up a HOB fuge, its been running for a week with chaeto. The algae did really get going once the tank was fallow, was fairly clean with fish. I also had issues with my canister filter (well not the filter, improper maintenance), so I have a lot of stuff going on at the moment that I am keeping an eye on and trying to correct.
The copper algae almost looks like cyano, but does not have the bubbles. I just wanted to tag along with this thread to see how lighting may be affecting yours and if I can see any similarities with what I see in my tank.
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