No Chlorine. . . If not Algae, then What?

[Pamsel]

We do have a robotic cleaner. I didn't realize it would circulate the water in the same way. I'll get that going in the pool immediately. Thanks so much, Carl. Can I add chlorine with just the robotic going . . . will it circulate the water enough to mix the chlorine and not allow it to settle on the bottom? I was thinking I might be able to slowly pour it into a stream made by the sump pump - We do also have a portable sump pump. I think I'll put that in the shallow end and keep the robotic toward the deep end, so as not to have it hang up on the sump pump. The more the better, eh?