In two separate tanks over the past 9 months every Euphyllia that has been placed in either of my tanks has failed. By failed I do not mean they died of brown jelly or some other known cause that was easily discernible. This first started when I added some Australian Euphyllias and has since now spread to every other Euphyllia including frags that were successfully grown in other hobbyist's tanks. What happens is that initially the Euphyllia opens nicely, feeds and does well. And then at some point from 1-3 months it gradually starts opening up less and less. Eventually it does not open at all and the tissue more or less just disappears. There is never that massive brown blob that occurs from brown jelly disease and no fish are picking at it. I did treat one of the tanks with Erythromycin to treat red slime and the problem stopped for a couple of months, only to come back and wipe out the remaining Euphyllias. I have been in the hobby for a long time and have grown some beautiful Euphyllias during that time. But now it is impossible for me to keep even common ones or frags successfully grown in outside tanks by others. I have dipped these corals and quarantined them when I got them and I have dipped in various solutions once they start failing without any success. I would like to know if anyoe else is having this problem especially with Aussie corals? Any help or treatments would be appreciated.