Webjaker

I have intake sponge and another sponge and filter rings in HOB. Asking specifically about the air stone added to Hob instead of in tank, as suggested in Corey's video

Cory recommended adding an air stone to the HOB filter, but in the forums, a few years ago he argued against it. Please give me your reasons for/against air stone in HOB vs in tank?

Cory, in your video you recommend putting an air stone in the Hob filter, here you argued against it. Can you explain your position?