There is a very good explanation of finrot here, in post #12 by nmonks, one of the fishkeeping experts. http
/www.fishforums.net/index.php?/topic/350500-long-thread-major-nitrate-help/page__p__2920988__hl__pseudomonas__fromsearch__1#entry2920988
In your case, the fish seems to have already had finrot when you bought it, so the cause will be in the shop's tank rather than yours. You are just having to sort out the problem. The majority of what is called fungus is actually a bacterium so the remedy needs to be an anti bacterial rather than an antifungal. White patches with stringy bits coming off it are the symptom of fungus, disintegrating fins are bacterial. As nightstar says, there are also internal bacterial infections which things like myxazin don't seem to help, they're mainly for external infections.
If the endler starts getting red patches and open sores on his body, that's the time to start think about euthanasia. If we could get antibiotics in the UK, that would be the answer, but we need a vet's prescription for them, and you can imagine what the cost of that would be, even if you could find a vet that deals with fish.
Clove oil is sold at chemist shops, it's an old remedy for toothache.
/www.fishforums.net/index.php?/topic/350500-long-thread-major-nitrate-help/page__p__2920988__hl__pseudomonas__fromsearch__1#entry2920988In your case, the fish seems to have already had finrot when you bought it, so the cause will be in the shop's tank rather than yours. You are just having to sort out the problem. The majority of what is called fungus is actually a bacterium so the remedy needs to be an anti bacterial rather than an antifungal. White patches with stringy bits coming off it are the symptom of fungus, disintegrating fins are bacterial. As nightstar says, there are also internal bacterial infections which things like myxazin don't seem to help, they're mainly for external infections.
If the endler starts getting red patches and open sores on his body, that's the time to start think about euthanasia. If we could get antibiotics in the UK, that would be the answer, but we need a vet's prescription for them, and you can imagine what the cost of that would be, even if you could find a vet that deals with fish.
Clove oil is sold at chemist shops, it's an old remedy for toothache.
. sad times. You don't think of things like this when your stood in a pet store thinking i'm going to set up an aquarium and get some pretty fish do you?
. 
