Brown alge

[Firstman1]

I have started my reef tank again been out for about 4 years but it's been three weeks since set up and running however I have gotten in the last few days a break out of this brownish or gold alge. Is it normal ? Is it bad ? Do I need to get rid of it ? What's causing this ? What can I do to subside this or rid it? Your help will be appreciated. Thanks

[Mike]

It is probably cyano, which is pretty normal after a cycle.

[alton]

Welcome to new tank syndrome, if you are using old liverock, it maybe full of phosphates adding to your issues.

[klwheat]

Do you have any pics of it? May be diatoms which is completely normal with a new tank.