re: Algae in pool

You should be good to go as far as shocking it goes. Try running the pump on waste along with running the Polaris and get some of that out of there. I use a Dolphin Nautilus instead of a Polaris and it vacuums up the algae much better after shocking. I hardly ever use shock because it seems to turn green afterwards for several days for some odd reason. I just go heavy with the chlorine and throw metals remover packets in the basket. Stays clear without having to wait several days for it to turn back blue again.