STN on SPS? Can't stop. What gives?

[ca1ore]

Once STN starts it can be tough to stop. I think the causes are myriad and simply underscore how sensitive these animals are to changes in their environment. At least STN can be stopped, unlike RTN which often results in total loss.

After many years of keeping SPS, I am quite draconian in my response to even STN - affected coral is immediately removed and fragged an inch above the affected area. I believe these things to be bacterial, so they can be spread.

 

[doctorwhoreefer]

Once STN starts it can be tough to stop. I think the causes are myriad and simply underscore how sensitive these animals are to changes in their environment. At least STN can be stopped, unlike RTN which often results in total loss.

After many years of keeping SPS, I am quite draconian in my response to even STN - affected coral is immediately removed and fragged an inch above the affected area. I believe these things to be bacterial, so they can be spread.

Iirc it's been shown to be any number of things.. Bacterial, viral, contaminants, stress, imo too much light can stn/rtn in addition to bleaching.. Really sucks there's not an easy way to tell which sometimes.

I would bet in this case it was the alk. I had it happen last year when I was out of town for work, my gf was taking care of the tank, but she forgot to turn the ato back on after a wc. Luckily evap wasn't too bad, but no kalk resulted in a 5-6 alk when I got back. I would say it probably took a solid month or two to stabilize judging by the corals looks.

 

[Fragmented 99]

Haven't seen any mention of your salinity levels, issues can occur if you get to high 1.028 and up