Please help, I am battling green color algae right now. As instructed by my pool place I added 3 pounds of Shock and 5-6 ozs of Clarifier and Algaecide. the next day it was still green and chlorine reading still low, added 2 more lbs of Shock and Clarifier and Algaecide. Pool is not green anymore, however it is very cloudy and algae settled at bottom. Chlorine reading is 3-5. I tried to vacuum the pool and when I do green water comes out of the return. I tried backwashing and rinsing my sand filter and vacumming again and it is still happening, please help, I am so frustrated with this. thanks! I have a 18' above ground pool with a Jacuzzi sand filter.