Algae questions

Hello people,
My 46G tank has been cycling for about 5 weeks now.  About a week and a half
ago, algae started growing on the glass, and now all the live rock is pretty
brownish, with more algae on the glass.  I have used lighting on the tank
for about 3 hours a day only.  Water from 5 stage RO/DI unit.  A few
questions:

Pictures of the algae to help with my questions
http://bighaig.com/algae/algae.htm

1) Is this algae growth bad? Or is this pretty normal for a tank with no
critters in it?
2) Is this type of algae bad?  If so, what can I do?
3) Will Algae Attack Pack - Ultimate Pack
http://liveaquaria.com/product/prod_Display.cfm?siteid=25&pCatId=531 - clean
the algae up?  Is edible algae for critters?  I will be adding these in
about a week or so.
4) If Algae pack will not clean it up, what can I do?

Thanks.
BigHaig