Does any body know what the relationship between rain and algae in the pond is? My pond will be going along great with good water parameters and really clear water. It rains and w/n a day or two the small cell algae has gone crazy. I can either put quilt batting in my skimmer to get rid of it or wait it out for 4 or five days and it clears. I will usually do a 10 15% water change in there sometime but if I do the water change the day after the rain the water does not seem to clear any faster than if I wait. What gives?