My pool has just developed green something-or-other on the vertical side of the cement deck which is (obviously) above the water line. We had a lot of rain over the last months here in Florida, so for a few weeks, it would actually go above the line, but not for long. The green is especially bad in the corners, and on the sandier side of the pool.
So, what do I do? Slamming does not seem like an effective method, as the water will not touch this area. Using a brush and chlorine or bleach seems like an idea that would only cause the pool to grow green.