I was hired by a homeowner to evaluate and determine the reasons that this infinity pool had problems. And this is the problem that the homeowner described to me. The basin would overfill water would flow over the top of the basin, and then the homeowner had to come up with ways to prevent that from happening. The other problem was, as it was flowing from the spa over into the basin, so again, as it was flowing over from the spa into the basin, the swimming pool water would decrease, but the spa water would stay at the same elevation or level.