Spent the day mucking around the house today; notably opening the pool up for this summer. In the last 2 weeks since I checked it, the parts that were exposed to sunlight have become one mass one algae. So in came the chlorine shock treatment, algaecide and clarifier .. oh and a whole bunch of acid to adjust the pH of the water. Should have cleared up in a couple of days. Also found a great
article on how to open your pool for summer.