New Monti and GSP Stressed

[LeadHead83]

Not sure this me being paranoid but bit worried about few new corals i picked up from LFS at weekend.

1 x Purple plating Monti
1 x GPS
1 x Duncan
1 x Zoa's

Before i purchased the new frag i had LFS do a full water tests to check Alk and Ca and Mg and they said it was ok apart from Mg was little on low side.

Water results:

Ca 415
PO4 0.03
Mg 1350
PH 8.0
Temp 25c
ALK 6.5 dKH

The Monti and GSP have lost almost all there colour and not looking good

The Duncan looked like this when it came out the bag i spent a while checking each of them before i dipped them.

And the Zoa's look fine they been opening and responding to a feed. all my other corals are all ok. only thing i can think that might have happened is the LFS put them all in one bag for journey home. i didn't think anything of it at the time but looking at the Duncan and the edges of the GSP look like they might have stung each other in the bag on the way home. wondering if Monti got in middle of it and got stung by both of them.

I've moved them to a shaded spot in the tank and placed them were there's a little less flow to see if can help them recover

Anyone offer any advices

 

[nereefpat]

Mg is not on the low side. Alk, however, is a 1/2-1 point low.

Could you tell us more about your tank? How old is it? Size? Lighting? Flow?

 

[LeadHead83]

Tank is Aquaone Nano Marine Cube 90ltrs been running for about two years before i got it.

Has TMC reef wave maker on lowest settings anything more it blows all the sand to back of the tank.

Lighting is a Marigold LED from Aquaone