algae problem

[tangov559]

getting algae with bubbles at top of my sand.. tank is been up for a good year... tested parameters..looks fine to me..what to do?

 

[bertoni]

More flow might help. Also, reducing nutrients in the tank can help. For example, growing and harvesting a macroalga from a refugium or the like has worked well for me. This article has a lot of ideas:

http://www.advancedaquarist.com/issues/august2003/chem.htm

It's written in terms of a nitrate problem, but all the ideas are worth considering for your situation, too, IMO.