After looking again in lower light, the pool looks a little more reddish than geen. I live in NC and deal with red clay. The lot next door is being built on andis bare. It was windy this afternoon also. So I am thinking the red dust from the lot next door blew in my pool and is now suspended in the water. I brushed the bottom and a reddish cloud rose up. Should I still raise my chlorine level to 15ppm?