Strangest thing, something has been degrading the base of my Efflo at night. This morning I woke up to this:
Best image i could get i'm afraid, but i've had this happen twice now, and I've pruned away the affected part. But it starts around a contact point on the rock, and there is usually a white flaky residue left behind at the point where the coral touches the rock. And I should emphasis that this ONLY happens at night.
In addition it is clearly an external source and not STN/RTN, as I've placed the parts that broke off during cutting into other tanks, and they show no signs of continued degradation in their new tanks. It's like something is dissolving/stripping away part of the skeletog, leaving the entire area extremely brittle. And it always begins at the exact point of contact with the rock and spreads from there, and in this general area.
I have a contact point higher up and another one where the colony intersects directly with coraline algae, which are completely unaffected.
Anyone have any ideas?
Edit: Here's a picture from a month ago, when it all started. I've highlighted the small bare patch, and the "white chalky residue" left behind.
Best image i could get i'm afraid, but i've had this happen twice now, and I've pruned away the affected part. But it starts around a contact point on the rock, and there is usually a white flaky residue left behind at the point where the coral touches the rock. And I should emphasis that this ONLY happens at night.
In addition it is clearly an external source and not STN/RTN, as I've placed the parts that broke off during cutting into other tanks, and they show no signs of continued degradation in their new tanks. It's like something is dissolving/stripping away part of the skeletog, leaving the entire area extremely brittle. And it always begins at the exact point of contact with the rock and spreads from there, and in this general area.
I have a contact point higher up and another one where the colony intersects directly with coraline algae, which are completely unaffected.
Anyone have any ideas?
Edit: Here's a picture from a month ago, when it all started. I've highlighted the small bare patch, and the "white chalky residue" left behind.
Last edited: