SPS Warfare - Losing Colonies Due to RTN

[Ostri]

I've lost 3 colonies to coral wars. Once was that an acro frag dropped on the pink birdsnest colony and from that wound tissue detaching quickly spread to the whole colony. I saved a few pieces while only the ones cut far from the wound/detaching area survived. Today my ORA insignis colony touched my sunset Mille colony and within 12 hours the whole colonies are now gone. I was able to save some intact pieces of both corals since I noticed it early.

This just puzzles me. It's definitely not a coral disease. I regularly cut frags of corals and they never develop something like this from an open wound. I feel they injected each other some lethal chemicals that basically made the whole thing to detach and develop RTN.

What if my corals attach each other again? I have some corals touching but mostly when an acro is attaching another stony, the other one develops RTN. That's just terrible to think about.

Does anyone have the same experience?

 

[nemodan]

In my case, when SPS touch each other, most of the time there is dead tissue exactly where they touch. But never seen, in my short 2 years with SPS, spreading to the full colony.

Sometimes both SPS are affected in the touching area, or only one of the 2 is affected.

I am talking about Acros, Monti, Bird nest.

 

[71xlch]

I have not had an acro RTN due to touching things....tissue lost but gained back over time. I have had a ricordea detach itself and get stuck on a green acro....lots died but not the entire thing.

I have only seen RTN on a already stressed acro.