Need it to this stuff and how to get rid of it!

I'm getting some kind of algae all over my sand. No matter what i do helps. I'm using RO water from LFS and tried the stuff from Walmart's water ro fill station thinking it might be the water. Still no help. I am running a octopus skimmer on my tank and pulls some good stuff out every 3 days. I feed my fish about every other day. I have tried doing multiple water changes. I have even sucked the stuff out and keeps coming back. It only grows on the sand.
I have a 29 Gallon
130 Watt Current USA light on for 10 hours a day.
Will post water prems in about 30 mins.
What can i do to get rid of this stuff once and for all?

 

media reactor and increase flow!

 

How old are your bulbs?

 

what have you got in terms of water movement in the tank Patrick

it looks like cyno to me , and typically there is less water movement near the sand bed , because people dont want sand being blown about, and cyno likes it in the stiller areas

Steve

 

Octopus skimmer, 2 Koralias so 1400 gph.