Bleaching again

[Twitterbait]

I know something is stressing my kids out again because i am seeing some while tips. I do have a problem with one of my sps frags in particular. while all the rest are growing this one hasn't grown an inch. now it has this strange type of bleaching going on again. it isn't a white bleach though it is a greenish hue and the coral is completly dead in that area. I'll post my parms when i get a sec. any ideas?

[Wiskey]

That doesn't look like bleaching to me, it looks like STN. When a coral bleaches there is still polyps and tissue, that does not look like the case here. You might want to think about fragging well into the healthy tissue to avoid further recession. I will be interested to hear about your tank setup, and perams.

Thanks,
Whiskey

[Fly Guy]

Originally Posted by Wiskey

That doesn't look like bleaching to me, it looks like STN. Thanks,
Whiskey

Whats STN?? I have had the same symptoms in the past and am curious....

[Weatherman]

“STN” is an acronym for “slow tissue necrosis”. Basically, the coral dies “slowly”. Another acronym, “RTN”, is for “rapid tissue necrosis”. In this case, the coral dies “rapidly”. What is considered “rapid” and what is considered “slow” is debatable. In either case, a part of, or the entire coral colony is dying or dead.

The cause could be anything: inadequate light, inadequate flow, too warm temperature, too cold temperature, or too rapid changes in temperature, parasites, too rapid change in alkalinity, or some toxin in the water.

Some environmental condition exists that the coral simply isn’t able to adapt to.

[Twitterbait]

ok, i figured as much. i will be fragging what is left tomorrow. i have a spare in the back so if it goes i will still have something.

[Wiskey]

Can you give details on the system? From your post it sounds like this is not a first time occurrence, perhaps we can help solve the root cause.

Whiskey