My Chlorine is between 25-30 so I know I only need to keep my chlorine at a 4, but a couple of weeks ago I had algae, which I DONT want again (and I really didn't think my chorine level was down). We are having a few events the next couple of weeks, so I want my pool in pristine condition. Is there any harm in always keeping my pool chlorine level at 6? I don't mind "wasting bleach" so besides that is there any harm in aiming high?