Hi Blues0022,
In "The reef aquarium vol. 2" book by Julian Sprung is explained how to treat anemones with antibiotics. He sugests to use cloramfenicol which works in my experience, but kills also the quarantine filter bacteria and you have amonia spike.
Cloramfenicol is an antibiotic from gram-negative bacteria like vibrio,which causes a lot of infection in reef fishes and invertebrates. About the eronfloxacine, I read an article in Sept 2006 issue in Coral Magazine and it is a modern wide-spectrum antibiotic wich can be used in small dosages because it is very powerfull. Cloramfenicol is bacteriostatic and eronflaxicine is bactariostatic and bactericide (does not allow the bacteria to synthesize some proteines inside) and also kill some gram positive bacteria.
I tried with heteractis magnÃfica which was deflated with the stomach everted for three weeks and starting with necrosis. Remove and added cloramfenicol and I reversed the condition in three days.
Then back in the tank , but should have treat for more time so him was ill again. After 3 weeks removed again and used enrofloxacine and now is in qurantine aquarium looking very healthy. I recommend to treat for 10 days with the antibiotic, even when the symthons have dissapear, and wait until necrosis is reversed to reintroduce the animal. Perform 1/2 whater change every two days when using eronfloxacine or cloramfenicol.
Please, note that when the animal evert the mouth is because want to get reed of small organics wastes which are decomposing in their stomach, but they can not do this unless you use the antibiotic (because thay are deflated). After one or two days of treatment they will inflate and start spelling the waste, the mouth will slowly strat to close and then is time to reintroduce in the main tank. Moderate to strong current helps the animal to expell the waste
Here you can find the pictures of the recovery with cloramfenicol in plastic bucket:
Three days after, back in the display tank:
But had to removed again because the treatment was too short
Today, after 4 days in eronfloxacine, in QTtank:
hope it helps