: Sand filters should be back-washed bi-weekly, or any time when pressure rises 10 pounds higher than the starting pressure.
Tip 7: Cartridge filters should be cleaned at closing if you close your pool for the winter, twice a year if your pool is open year-round, and any time the pressure rises 10 pounds higher than the starting pressure.
Tip 8: Clean all leaves and organic matter from your pool as soon as possible.
Tip 9: Use a surface cleaner to clean above the water line of vinyl pools.
Tip 10: Always have fun!