I have some new t5 lighting I bought a zoomed ocean sun bulb 10,000k and a zoomed ultra sun which now I find out is only 6500k. Its a new tank so I do have brown algae will the 6500 promote growth of the algae and should I replace it with a 10k?
Odds are the brown algae are diatoms. Common in new tanks and consume the silicates in your system. Just need to wait it out. They'll disappear as soon as they showed up. The lights won't make too much of a difference either way.