Brown algae everywhere !

[donato103]

I started a new 55 gallon tank 2 months ago. So far it has 55lbs of live rock and i use crush coral and i have a fluval with blue t5 lighting. There is too much algae growing on the crush coral surface and brown algae hair on the live rocks. What can i do to stop the growth. Does my tank need anything else for live corals. I have two damsels and a fire shrimp in the tank. Need some advice please thanks!