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.
Never put tabs in the skimmer. Also remember that for every 1ppm of Free Available Chlorine you will also add 0.6ppm of CYA. Without proper dilution and backwashing of the swimming pool water the CYA will build up very quickly.