As Watermom said go ahead and shock the pool again, but you need to get thechlorine up to at least 12-15 ppm in order to do any good. If you can , at least take a water sample to a pool store that uses drops, ot strips, and get them to run a set of tests on your water-- just don't buy all the junk they'll try to sell you. We REALLY need a correct CYA level to help you get the pool cleared up. Also, you might want to consider stocking up on some bleach to do the shocking with, instead of the powder--your calcium is getting high and I thnk the powdered stuff you're using is cal-hypo, which is raising it further.

Janet