A Bull Frog Problem.

[Duriel]

That frog moved into the goldfish pond either/or because it was easy food/comfy water to chill out in.

A) Permanently adopt that bullfrog (I'm partial... my favorite option as I see hundreds of them splattered on the roads around here in the warm/wet season... and walking my dog results in me yanking on the leash hard to avoid her eating frog toxin/dead thing bacteria)
B) Remove the pond.
C) Call in a tactical nuclear strike on the local area... not so local as to affect you, but enough to remove this nuisance.

[Tubby0512]

I don't want him killed. I only take him in the winter because he always try to hibernate in the shallow pond.

[demon amphibians]

I personally think you should keep doing what you have been doing. what you have is a unique relationship with this frog. And if you move, might as well take him with ya it obviously seems to be part of your fam. and it can keep some pests away, cant beat that.