The sad news is once they get HITH it is very difficult if not impossible to cure..the best you can hope for is to keep it in a sort of remission... and the only way to accomplish that is pristene water condition... varied diet and definitly no stress.. and add some aquariaum salt according to directions ..it reduces the stress ... there are also meds out there...but they really don't show me much..hit and miss.... cannot say they do not work because some may .... good luck...