Green mushroom coral issue

[salty blues]

I got my first corals several weeks ago. Yellow polyps, red mushrooms, and green mushrooms. The YP & the RM seem to be doing fine, opening and showing growth. The green mushrooms have remained the same smallish size. They are green and healthy looking, just not opening.
I have tried different locations a couple of times for flow and light, but they still won't open very big. Any ideas?
Parameters I have tests for:
pH 8.2
ammon 0
trite 0
trate <5
phos 0
ca 360
temp 80*f
Running 65 watts pc smartpac bulb on a 29g.
I have been adding purple up while testing for calcium.
Opinions and ideas appreciated.

 

[artie1209]

Patience Leave them in one spot for a few months. mid tank to bottom and not a strong current. They may simply need more time to adjust.

 

[reefkprz]

I suggest placing them at an angle like a backslah to your light mushrooms seem to prefer this type of placement for some reason. also like the previous poster mentioned they just may need some time to acclimate to your tank.

 

[nordy]

My striped green mushrooms came really small are growing slowly, and seem healthy, but are still small. Yesterday I noticed 3 new baby shrooms on the rock! I guess they are just slow growing but they must be happy if they are now reproducing.