💧 Sand Filter Calculator

Calculate pool sand filter requirements, replacement schedules, and optimize backwash frequency for crystal clear water.

Average: 20,000 gal (inground), 10,000 gal (above ground)

Common sizes: 19", 21", 24", 27", 30"

Pool Filter Sand Guide

Choosing Filter Sand

  • #20 Silica Sand: Standard pool filter sand (0.45-0.55mm)
  • Zeolite: Superior filtration, uses 50% less than sand
  • Glass Media: Eco-friendly alternative, lasts longer

Maintenance Tips

  • Backwash when pressure rises 8-10 PSI above normal
  • Deep clean annually with filter cleaner
  • Check sand level yearly and top off as needed
  • Replace sand if water remains cloudy after backwashing
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