So I recently had surgery that had me unable to do much for a week. I ran out of chlorine the night before the surgery and asked everyday for hubby to go pck some up for mw... After a week I finally got chlorine... and believe it or not not a bit of a sign of algae... Of course as soon as I got some chlorine I dosed it up to slightly over slam level and then let it gradually fall back to normal ranges. It still needs to be vacuumed and brushed but I will get to that tomorrow