David Pagan es un experto en estanques que ha desarrollado una forma de crear piscinas naturales que no tienen bomba ni filtros. Crea corrientes de agua con oxigenadores (aireadores) y usa plantas para limpiar el agua.
Natural Swimming Pool/Ponds (NSP's) are a chemical-free, low-maintenance alternative to traditional chlorine pools. The water is clean, crystal-clear, and filtered naturally using a built-in biological filter.
"In July every year we have an event called 'Secret Gardens' Last year we visited some of the best decorated backyards in the neighborhood and this guy had turned the complete backyard into a pond and gardens. The backyard was about 150 feet wide by 50 feet deep and a pond covered 85% of his lot. This 3 level pond was just beautiful and equipped with a filter hidden behind some bushes."