How to get rid of red algae

[Lampshade]

I just got over a pretty bad red algee takeover. Reduced the lights to 6 hours a day, sucked what i could while doing water changes, and now its nearly all gone with only a few small patches left that i'll hopefully get this water change. I'd also moved my powerheads around a lot to try and get more flow in those area's. The algee was actually a pretty good indicator of area's that had low flow. Theres apperently many different causes, too much light, phosphates, dirty water, etc. But mine seemed to be a flow issue after i'd moved some rock around. I didn't use Coral Snow, but.. if i had SPS or coral that was more dependant on light i probably would have.
What my LFS told me that actually made a lot of sense was that even using Coral Snow or any other remover, if you dont' get rid of the original problem, it'll just come back.

[Reefer Rob]

Is it cyanobacteria or red algae?

If it's cyano and your tank is new just chill, it should eventually go away on it's own. It is naturally occurring in all tanks and blooms when there is a change (good or bad) it can take advantage of. Stability is the key to a clean tank, it should disappear when you tank balances out.

Red algae requires a more aggressive approach.