Milky white green is not a usual result. Have you put in anything other than bleach? Usually when it's cloudy near the middle to end of the SLAM, it's a clearish color. Were you still using the cartridge pump?
I was battling cloudy water after constantly maintaining a good SLAM... looked into DE for our sand filter, and one afternoon while I was out tooling around, my husband poured in some Ultra Bright from Leslie's.
Unfortunately for my argument, it worked. It frigging worked. For days, we hadn't been able to see the bottom of the shallow end... and just 4 hours after this stuff was poured in, we could see nearly 2/3 of the way down I to the 8' deep end. *sigh* Dangit... I feel so defeated. LOL