The pool wasn’t getting much debris so I didn’t vaccume for 2 weeks. So when I did it today I noticed for the first time green spots on floor. They wouldn’t come up without a scrub. Than when I was swimming I noticed spots here and their I missed and was able to get it off with a foot rub. Was this stuff algea ? Was my fc too low to cause this ? My water is clear , so no issues their . I’ve never experienced this before. Also it’s my first summer ever owning a pool so I don’t know if this is commit or not. Thanks for any knowledge you guys want to drop on me