Hair algae on the brain

[Static]

My tank is only about a month old

Last time I tested was tuesday
amo <0.1
PH 8.5
Nitrate 7
Nitrite 0.2
calcium 440
sg 1.025
KH 120
Temp 81
PO4 0.25

I'll test again tomorrow morning.

there is one small part of skeleton showing, where there is no algae growing. It was showing within 1 day of bing in my tank, but has not grown since. I can not see under the algae, but it apears that the algae is growing right on the flesh, I can see flesh where the algae is thin. The brain deflates sometimes to a point where you can see the outline of the skeleton clearly.

How do you know when it is ready to be fed, does it have feeder tentacles like a candy cane?

My tank is a 20 gal, with a 130 wat coralife pc, a coralife super skimmer (65), and one additional power head that is 200gph. I currently hosts 8 hermits, 6 snails and one yellow tailed blue damsel (1.5" long). I currently feed the damsel once per day.

I think I probably need more flow

I beleive I have an unhealthy coral, what should I do?