AEFW?

[neoh]

Originally Posted by spit.fire

What are you water parameters?

Sg 1,25
pH 8.3
78F
450 Ca
980 Mg (was 1300 before last waterchange?) - I'm going to dose Mg for a few weeks to raise it.
7 alk dkh
NO3 20
Phosphates 0

[neoh]

Originally Posted by Sebae again

Check your tank after the lights have gone out and have a look for any small starfish. Might notice the odd one on the glass. If they look sort of like Astrea stars , They could be the coral eating variety.

Asterina? I do have them. Not many, but they are around the place. There were a couple attached to the bottom of the monti in the photo. From what I've understand, is they will eat the dead spots from corals, but not healthy tissue.

[Aquattro]

Originally Posted by neoh

From what I've understand, is they will eat the dead spots from corals, but not healthy tissue.

That's the only kind I've ever seen.

[Sebae again]

I googled acro eating starfish. As I recall, it was GARF a coral research /grower company that shows a tray full of them . There are other posts / pics aswell.