I REALLY hope someone can help me with this rather disgusting issue. I seem to have these gross slimy "pods" springing up on my liner and other areas like the stairs and light fixture even the skimmers - anything that offers structure for them to grab hold of. I had some occurrences of this when we opened this year but brushed/vacc'd to waste and everything seemed fine but they are back, both in the same areas and new zones. I am leaving everything in place until an expert weighs in meanwhile I am thinking black algae but want to hold off using chemicals until I am advised of the proper treatment. Water is crystal clear and perfectly balanced. See attached photos I have more but that's enough for one viewing. These things are absolutely disgusting! I am completely at a loss...HELP!!!