Q: I got home from work last night and couldn’t wait to get into my pool to soak away the day, but when I got to the backyard, the pool water was green—not light green, either, but dark. I didn’t even ...

Q: I have recently had a medium-sized pool installed in my backyard, and my family and I have used it a lot already to cool off from the summer heat. However, the water is starting to look a little ...