I am a new pool owner and was told to add algaecide if I detected algae. I argued this because I assumed chlorine and shock would take care of the problem, but I was assured I needed the algaecide. I used it this morning with my other weekly maintenance, and now my water is mucky and almost green. I cannot empty my pool and start over, nor do I want to add a ton more chemicals. Is there something I can do between filtering, or draining a couple inches off the pool? Thanks!