In light of its measly $1.2 million price tag the film's quality relative to bigger-budget horror films is striking.
It depends on the size of the pool. A normal size pool should have at least 2 skimmers. It depends on the size of the pool. A normal size pool should have at least 2 skimmers.
A pool typically has two to three return jets where the water that filters through the circulation system returns to the pool. For effective circulation, it helps to have these multidirectional jets, because they allow you to determine the direction that the water returns to the pool. Point the jets in a direction that spins the water in the pool. Usually, that means directing the jets to emit water downward and in the opposite direction of the pool skimmer -- this setup helps mix water from the bottom of the pool with water at the surface for improved circulation.