New Tank Set up Help - Yellow Algae?

Hi all,

I'm setting up a new tank after a wipe out last year. I never had yellow
Algae before and wondered if this is a good or bad sign?

My set up is 70g with 60lbs of Crushed Coral, 20lbs of arragonite sand, 12kg
LR (more to be added) 4 x 55W T5 lights (7K) and 40W Actinic tube salinity
0.022 at the moment, temp 25.5 - 26C

Put the water and salt in two weeks ago, put the LR in 1 week ago. Today i
suddenly have yellow algae on the LR and not so much purple algae. Got the
LR (cured) from LFS. The algae seems to be mostly were the powehead pumps
the water onto the LR and some on the bottom?

I've also got a seaclone 100 and a vectrom 15W UV neith switched on yet.

Is thi yellow algae a good sign?

Les