no to be honest havent seen her poo lol, but she does eat at least 2 pellets and some blood or brine shrimp i no shes under wieght but she wont eat alot, does any one no why she carnt use her tail to swim. shes been like this for nearly 2weeks i have medicated it for ick as she had it twice and 1 week of melafix. help please
The skinnyness is most likely caused by either internal bacteria or internal parasites, i would start off by treating her for internal bacteria first as that is a more common fish desease.
For internal bacteria, "anti internal bacteria" by interpet is a good med, for internal parasites meds for these tend to be quite uncommon in england, but anything that contains a large dose of metranidazole in its ingredients tends to be good for treating internal parasites. I would look on ebay for anti internal parasite meds as you'll probably have more luck there.
For either desease/parasite, you should treat the tank as a whole, but be aware that most anti parasite meds tend to be harmful/lethal to crustaceons, invertebrates and molluscs.