Buds nailed it. No need to change anything. Well, I like to use Prisoner "Test Stasis/Taper" protocol so I'd continue using HCG during the "stasis/ (100mg of test or test/masteron per week) . In a traditional PCT, do as Buds outlined it.
500iu of HCG twice a week is too much. The goal here is just to mimic normal levels. So how much AAS you use has nothing to do with the amount of HCG needed. No need to use too much as you can desensitize the testes, not something you want!