I don't want to sound rude or crass, but several times I provided you with advice on how to save those corals. In 20 years of keeping reef aquariums, I've dealt with brown jelly disease (rapid tissue necrosis) multiple times. As I said before, the only way to have any effect on RTN is to frag off areas where necrosis is taking place and follow it up with a dip. Then QT the coral so the disease doesn't spread to other colonies. If bacteria is causing RTN (again we can only guess, as it spread to other corals, so likely it was a bacteria or pathogen) the only way to have any effect on an infected coral is to frag off diseased areas. From what I read, the only real treatment done was iodine dips at the wrong concentration. Bacteria that causes RTN is usually embedded in coral tissue. This means iodine cannot reach it, or at least not in high enough concentration to kill it. This is why you need to frag diseased tissue off, then provide a dip in hopes of stopping spreading.
If you continue in the hobby, I would recommend the following. A good frag kit, that has all the tools needed to frag off small pieces of coral - even off of small frags. A second coral tank with basic filtration and decent lighting, to QT specimens or place them for treatment when they get sick. A good, reliable acclimation system along with a work area for fragging/doctoring corals. A bright lamp, cutting board - etc are all mainstays of this area. With some guidance you could be taught how to keep a reef, where this would be unlikely to happen again, or if it did happen again, you had the tools on hand to correct it.
I have plenty of rare, colorful, healthy small acan colonies I'd be willing to ship you, but you need to have the tools in place to properly keep them and correct emergencies before I part with them.
