So today I pulled off the solar cover after being on since Sunday night and found 2 small algae spots on the bottom where the sun is shaded more of the day then the rest. My results are good and curious why this came about and if I should be concerned. I brushed after seeing this and put the pump on high and brought chlorine to 12 I also threw in my Aquavit to let him stir up the bottom I didn't. I'm gonna goblin later and brush again. Should I keep slam level all day/night? Is this just a wierd event that because they were in a "divot" in the liner that it hasn't been brushed. I looked under my wedding stairs and nothing there.