Toilet tank constantly losing water after it fills up.
I am having an issue with my dual flush American standard toilet. After I flush the toilet it fills up fine but slowly the tank leaks out and then it starts filling up again repeating the cycle constantly. I let it fill up and watched it slowly drown but can’t see anything going into the actual bowl not from the sides at least. What is my problem here? What do I tweak or what do I replace?