I would wait a bit before adding the cya. Since you are dealing with a green pool and a dirty floor, you will most likely need to backwash some in this first week and backwashing will remove the cya. (Backwash when your filter pressure rises 8-10psi over your clean filter pressure.) Once you get your pool cleaned up, then you can either add some cya directly or use trichlor (or even dichlor) for awhile as your source of chlorine, both of which have cya in them. BTW -- cya is sometimes called conditioner. Check the label ingredients.