In a 5600 gallon pool, half of a 121-oz jug of 8.25% bleach will add about 7ppm of chlorine. You may find that you need to add some morning and evening. Pools with no CYA lose chlorine fast. Just do a quick check a couple of times per day and if the chlorine is getting too low, just add a little bleach. Just make sure you keep a reading. I was able to only add bleach once per day when we had no power but I had CYA in my pool. You don't. So, you'll just to have to keep an eye on it. It will be fine.