Green algae problem

[cmonicarl]

How can I get rid of green algae that is invading my soft corals. I'm feeding small amout every other day. Its a 15 gal. with LR and two fish and one coral banded shrimp, ten small blue leg crabs. Small skimmer and filter. Let me know. Thanks.

 

[Dav3]

Are you doing water changes? You have excess nitrates and/or phosphates. Need to remove them. Easiest way with that size tank is with water changes.