We had the pool guy treat our salt water pool for green alge. He said it was not safe to use the pool for seven days. That seems like a long time? Is this normal.
That does seem a bit drastic. Did he give a reason why? High sanitizer levels needed? Partial drain and refill of the water needed? Most algae problems (particularly green algae, which is usually easy to treat) can be corrected in significantly less time.