Hi Judi,
Not Janet here, but hope I'll do!

With a cya of 70, your chlorine levels are not near high enough to keep algae from forming much less to fight it!

Stabilizer . . . . . . Min. FC . . . . Max FC . . . 'Shock' FC
=> 0 ppm . . . . . . . 1 ppm . . . . . 3 ppm . . . . 10 ppm
=> 10 - 20 ppm . . . . 2 ppm . . . . . 5 ppm . . . . 12 ppm
=> 30 - 50 ppm . . . . 3 ppm . . . . . 6 ppm . . . . 15 ppm
=> 60 - 90 ppm . . . . 5 ppm . . . . . 10 ppm . . .. 20 ppm
=> 100 - 200 ppm . . . 8 ppm . . . . . 15 ppm . . .. 25 ppm

As you can see in the chart above, you need to keep your cl between 5-10 ALL the time and when you need to shock, you'll need to take it up to 20ppm. Since you are reporting a CC reading of 1, and you have low FC level and you are seeing algae, all these things tell you that you need to shock the pool and try and hold the cl at 20. The more times per day that you can test and add bleach to get your cl back up to 20 the better. The very minimum is twice per day: early morning and in the evening when the sun is off the pool. But, if you can test 3 or 4 times per day it will clear up faster. The key is to sustain the high cl reading and not let the FC yo-yo up and down. When you get to the point where you are not losing more than 1ppm of cl from sundown to sunup and when you have a CC reading of 0 and no more algae, then you can let your cl drift back down to between 5-10. Never below 5 however or you will fight algae again. Also run your pump 24/7 while you are trying to clear this up. Also, brush the sides and bottom of your pool daily.

What exactly have you added to this pool -- meaning ingredients, not just "shock"? Your cya is already high at 70 so you really shouldn't use any trichlor pucks or dichlor powder in your pool. Best to stick with bleach or liquid chlorine.

What is the volume of your pool?