Hi all I have 2 juvi axolotl in a 20 gallon high tank one is luecistic and the other is wild colors the luecistic one has had this fungus looking stuff covering his feet (see pic below) a few days have passed and now its gone along with almost all its feet and starting to take its tail it is extremely skinny as of recently but was eating as much as the other Please help I don't know what to do

