Just be careful not to have two different grounding rods in your house's electrical system that can cause issue with grounding and potential difference between the two grounding rods, and poses a safety issue as well. many places its against code to do this so check your local codes before modifying your electrical system.
Affordable Grounding
My Frankenstereo has assorted grounding elements behind the rack. The head end of the streaming chain is in another room. At the wall outlet, there’s Nordost QBase 4 Mk II – with a ground lug.
I tried this inexpensive grounding tweak clipped on to the lug. Subtle – but it works. More transparency. Probably similar results with the Puritan Ground Master – and other brands. Worth a try! Certainly more affordable than an Entreq. I purchased the cheapest one with the copper wire/paper cylinder. (Not a fan of silver-plated wire.)
YMMV