As a stopgap should you run out of R-0870 or R-0871 again, a cheap OTO kit will keep you going.

The dichlor will bring your CYA up just a little, and give you a slight rise in your FC. You probably need to add bleach as well, testing just before, and again 30 min after. I doubt that 3 oz of dichlor would have been enough. Not a problem if you overshoot just a bit on the FC. If you have the time, it might be a good idea to brush the pool as well.