Help with Coral

[Metrontech]

So its odd you say the Xenia doesn't like too much flow because it appears to be the only thing that is growing

I have put a rock beside the Toad stool and its white polyps have come out a little

But my coral just never opens up...like it was in the other tank

My Magnesium is a little low, 1000 but the rest is find

I am using a WP25 wavemaker set on the lowest speed and W1 setting

ALK 9
Calc 420
Nitrate 0
Phos 0

Any ideas?