In-ground, semi in-ground, and above ground swimming pool Spring openings and Winter closings. Installation, filter, repair, and service. ProperPool.com works with safety covers or tarp style covers with water tubes. Using sand, cartridge, or D.E. filters with salt or chlorine system, solar, heater, waterfall, spa, bottom drain, etc. Plumbing, liner changes, new and used pool installations, landscaping, and more. Looking for a new winter cover or fresh clean liner? Safety cover and new liner measuring with installation. Licensed and insured professional service to PA, NJ, and DE.