I have been battling algae in my pool since I moved into my house. This pool had been neglected for many years and I'm still dealing with the repercussions. One issue that I cannot solve is that I have algae underneath my vinyl pool steps. The reason I know this is because I've patched some cracks in the steps and when I push down on it, I can see some green/yellowish material come through. I'm very confident that this is mustard algae and it's impossible to fully rid the pool of it until I eliminate this colony. I doubt there is a solution to this besides replacing the steps & liner (which needs to be done) but was curious if anyone ever experienced this before or had any ideas. Thanks