green hair algae

[Maunus]

Hi!

this is my first marine tank. I have a 75 gallon, with a sump, and an aqua C ev 180 skimmer. I have live rock.

one lawnmower blenny, 2 amphiprion clowns, one royal gramma, one 6 line wrasse, one yellow clown goby. hermit crabs (5?) and snails (4?) and 2 turbo snails.

have terrible infestatiion of green hair algae.

change 10% of water each week.

suggestions?

have T5 lighting.

thanks!!

Bob

 

[Kingpo]

What type of water do you use to top-off and do your water changes?