I have algae...

[MikeP]

My tank is fairly new (about a month). Brown algae is starting to develope on the substrate (crushed corel) and on the rocks and dead corel I have as decoration. Yesterday I didn't notice any but today it's quite noticeable. Is this normal? Can I add a clean up crew now? And what should I get to help keep algae under control.

Thanks for any help


PS I know now that crushed corel was not the best choice but I feel I'm stuck with it for a while until I decide to rearrange my tank one day.
Also had my water tested yesterday and they told me my amonia and nitrate levels were OK