Algae question

[JackRent]

my tank is 3 years old. i recently set-up a calc reactor and phos ban reactor so now my water parameters are spot on and stable. my lps and sps are doing well and look grea. in the last couple of weeks i have noticed little clumps of dark green "algae" it is low and bushy and it's "leaves" look like tiny ferns or even tiny feathers.
what is this ? how do I deal with it ? is it even bad ?

 

[Roy G. Biv]

LOL.. I get that once in a wile, looks like dark green ferrns. I usually pull it out and scrape the remaining off with a razor. I think it some sort of macro algae. I didnt think it looked all that bad, looked like a little plant

 

[madcowz]

Does it have a strong foothold? Pictures? Sounds like bryopsis.

 

[JackRent]

it is tufts here and there. what is bryopsis ? bad ? It is dark green and looks like little feathers. only appeared as my alkalinity stabilized at 12 and my PO4 dropped significantly. My sps corals are very healthy and everything looks great.