New Tank Algae Question

[wd2424]

My tank started with dry rock, dry sand and I used Starter bacteria. All has been up and running well for around 6 months. Tank is 75 gallons and only has 1 clown fish and Cleanup crew of multiple types of snails. Has one zoanthid as well (didn't realize I should have waited till it was too late). All inhabitants are doing well. Zoanthid started staying closed up halfway recently (im assuming because the is disturbing it). Its brownish in color and looks like long hair. Some of the algae looks like shorter hairs with small bubble one it. Could this just be part of the new tank uglies? The bright green color has been on the rock since about month 3 and does not brush off with a toothbrush. Are either of these (bright green or long hair type) algae things I should worry about or should I just let the tank continue to run its course?
Phosphates - 0
Alk- 8.4
Ammonia- 0
Nitrite - 0
Nitrate - 5ppm

 

[Uncle99]

You can’t run phosphate zero, bad guy algae loves that.
Bump that up, start a phyto dose, bring in those good guy algaes and bacteria and it will go away.