Well as expected no amount of trying to treat ich or bacteria or columnaris etc helped her. Her friend going the same way and I have finally worked out that it must be gill flukes and tapeworm from the long worm that appeared following the pimafix and metafix doses. Not enough to kill the problems but probably these meds disturbed the parasites and that was the final shock to the poor fish and hastened the death. I have poured over so many papers anecdotal and peer reviewed in the last week that my head is brimming full of the dangers associated with keeping aquarium fish! Now I know I should dose every new fish in the quarantine tank with Praziquantel and I will now need a 3 week treatment regime on the current tank to clear the problem for the future. Seems that these parasites are common and some fish cope with them until stressed. As the flukes release their live young into the water just getting rid of dead fish and water changes won't cut it. Maybe salt...but no certainty. Seems like LFS are not treating their tanks. Buyer Beware! If you do not implement good husbandry. I just wish I had known all this before I ended up killing my two first ever fish. With my new fish (ordered from livefish.com a week ago) arriving today, I am off to the local store to get my Praziquantel. After all, we worm our dogs and cats and all other farm animals, to not do so routinely for fish makes no sense. Tell me this isn't a worm see attached!