Hi There. Just finished filling up our new pool last week. The following day was literally the coldest day of the year (so far). I've been brushing the pool multiple times per day, so does the pool builder who also checks the chemicals. It seems to be full of a bunch of dirt from the surrounding area. My wife says it looks green but I think it's because it always has a coat of brown dirt on the blue pebble tec. Anyways, learning a lot here already that I had not (yet?) learned from the pool builder. Excited to learn more!