How long should it take to clear black algae

[PoolDoc]

There's a good chance the smell is unoxidized -- or incompletely oxidized -- organics, and that it will be taken care of with 30 ppm FC + sunlight, even with a CYA=160. You'll have to wait to see, however.

Regarding the high CYA, it's definitely thought of as super-bad, but I'm gradually coming to the opinion that it's just different, and requires a different approach to pool care. It certainly has benefits: for example, at 30 ppm, if your pool has no algae, you can probably wait a week before you need to chlorinate again. Obviously, this has real benefits when you are planning to go on vacation.

I've got to go -- I'll have to get back to you. But the bottom line for today is, "Hold the high chlorine and see if it and sun resolve your problem".