Hi,I would advise you to immediately increase hemodialysis
duration to 4 hours x thrice a week,as presntly dialysis is inadequate.
Coming to your specific question of stopping dialysis,the only substitute available is kidney-transplant.
There is no natural treatment to avoid doing dialysis.
I would also like to caution you to not get misled by false claims of many quacks promising the same.
All the best