Need help connecting a Hygger gravel cleaner.

[RobVG]

They said it fits most faucets, but it doesn't fit mine. The threads on the adapter are a larger diameter and too fine.
I didn't see any other adapters listed and am dreading searching for one at the hardware stores. Should I go to Home Depot or try the pet stores?

 

[Rusty_Shackleford]

I would try Home Depot first, they are far more likely to have an adapter than a pet store or LFS. Then try Amazon.