So, last night was the first night with no chlorine loss. The night before, you still lost a substantial amount.
Already lost 5 today although your cya level is low so much of that is probably lost to the sun. Why don't you keep the cl high all day today and see if you go another night with no chlorine loss and see if you are still getting CC readings no higher than 0.5. If tomorrow morning shows no overnight loss and still good CC reading, then go swim tomorrow. Swimming with low cya and fc of about 10 is OK but, like I said, wear old swimsuits.
If you have big loss overnight and CC over 0.5, I'd keep it at shock levels again tomorrow and try again for maybe Monday. You do not want your family swimming in water that is not safe.
Can you go someplace today and try and get some DE? I think it might help and tomorrow is Sunday and Monday is July 4th so pool stores probably won't be open either day.
Also, tell me again so I don't have to reread the entire thread. How much dichlor in total did you put in this pool? And, in addition to the dichlor, did you buy any cya and put that in? If so, how much. When was the last time you added either dichlor or cya and when was the last time you tested cya level and what was it?

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Glad to help. Hoping you can swim this weekend!
