Swimming pool plumbing components, namely, swimming pool filters; Swimming pool water cleaning and filtering units; System for supplying and circulating air and water to ponds comprised of piping apparatus, air filters in the form of strips and cartridges for use in pond aspiration and ventilation systems; Water filters in the form of strips and cartridges for use in pond filtration systems; Parts of air and water filters, namely, containers for filters, for fine filters, in particular for fi...