I've just cycled.

[cba191]

Im assuming this is algae and needs a tang and a cuc?

 

[Tahoe61]

You are correct.

Reefcleaners.org has a nice site to research algae types and algae eaters.

How long are you running the lighting each day?

 

[slingfox]

Im assuming this is algae and needs a tang and a cuc?

If I were you I would scrape that growth off (either outside the tank or inside) while ordering a CUC in parallel. Algae can grow exponentially and there is no better CUC than the reef keeper. CUC also prefers newer growth so they will should have plenty to graze on if your tank is growing algae now.