I have green water in my pond and it won't clear.

It's often at points like this, once basic healthy water
chemistry has been established, that people often break
down and get a UV filter.

Should I let the pond be and wait it out?

How long has it been?

Or use the calcium bentonite and if I do, how do I use it?

Stuff is very safe, hard to abuse, no real reason not to use.

Someone else will have to suggest a dose though.

Knowing what I know about it, /I/ would probably just toss
a whole bunch in...

C//