I have an AGP and I have an Intex Sand/Saltwater Generator filter. Recent storms shut the power off to the pump, and I was working for several days (National Guard). Therefore, I was unable to get it turned back on until a few days ago. The water seems to have cleared up, but the bottom and sides are covered with green algae. Should I shock the pool to get it back right? We have some folks coming over one week from tomorrow, and I would like to get it back right before then if possible.