How do I repair my crazy toilet?

I have a toilet bowl that has been working fo 20 yrs all of a sudden it still flushes good, but the water in the bowl, no the tank runs out after 4-5 hrs, tank remains full . Tried putting a hose down the vent , work better for a day or two but now does the same thing , 4-5 hrs the bowl is dry with no water, yet tank is full

  3 answers
Your comment...