How to calculate capacitor and resistors on virtual ground circuit?
That is not a great method to use if you have more than one or two low current circuits attached to it. 

The issue is any current passing back through that virtual ground has to make it through those resistors and changes the reference point. As such the resistors need to be small, which wastes a lot of current. The capacitors need to be fairly large regardless.

You would be better to use a more active circuit. Note the doubled up capacitors. This ensures a faster on time since they automatically charge up to half rail.







simulate this circuit &ndash; Schematic created using CircuitLab

As mentioned in the comments, op-amps are only good for a limited amount of current. If you need more than that there are specialized devices for this or you should be considering a proper dual-supply.