How Often Should I Clean My Pool Filter?Updated a month ago
Your pool filter works hard to trap dirt, debris, and contaminants—but it can’t do its job properly if it’s clogged or dirty. Cleaning schedules vary by filter type, usage, and local conditions. Here’s a straightforward guide for pool owners to keep sand, cartridge, and DE filters running efficiently.
1. Sand Filters
Cleaning Schedule:
Backwash every 2–4 weeks during peak season (summer).
Deep clean sand media every 6–12 months (or if water flow stays weak after backwashing).
Replace sand every 5–7 years (it loses filtering ability over time).
How to Clean:
Backwash: Turn pump off, set valve to “backwash,” and run until sight glass water runs clear (2–3 minutes). See in-depth backwash guide here.
Rinse: Switch valve to “rinse” for 30 seconds to settle sand.
Deep Clean: Add a filter cleaner solution to dissolve oils and calcium buildup.
Signs It’s Time to Clean:
Pressure gauge rises 10–15 kPa above normal.
Weak water flow or cloudy water.
2. Cartridge Filters
Cleaning Schedule:
Rinse cartridges monthly during swimming season. Save time by using a water wand filter cleaning device.
Deep clean every 3–6 months (or when pressure rises 10–15 kPa).
Replace cartridges every 2–3 years (sooner if torn or damaged).
How to Clean:
Rinse: Remove cartridges and hose off debris with a garden nozzle.
Soak: Use a filter cleaner solution overnight to dissolve oils and scale.
Dry: Let cartridges air-dry completely before reinstalling.
Signs It’s Time to Clean:
Reduced water flow.
Visible dirt or grease on pleats.
3. Diatomaceous Earth (DE) Filters
Cleaning Schedule:
Backwash every 1–2 weeks in summer (or when pressure rises 10–15 kPa).
Recharge with DE powder after every backwash.
Strip & deep clean grids every 3–6 months.
How to Clean:
Backwash: Similar to sand filters—run until water clears.
Recharge: Add fresh DE powder to the skimmer (use 80–90% of the original dose).
Deep Clean: Remove grids, hose off old DE, soak in filter cleaner, and reassemble.
Signs It’s Time to Clean:
Pressure spikes quickly after recharging.
Cloudy water despite balanced chemicals.
Factors That Require More Frequent Cleaning
Heavy use: Frequent swimming or pool parties.
Dust storms, pollen, or bushfire ash.
Nearby trees (leaves, blossoms, or bird droppings).
Algae blooms (clog filters rapidly).
Maintenance Checklist for All Filters
Check pressure gauges weekly.
Inspect seals and O-rings for cracks during cleaning.
Use filter-specific cleaners to extend media life.
Store spare cartridges or grids for quick swaps during deep cleans.
Need Filter Supplies?
Browse our Pool Filters & Filter Cleaning Solutions for backwash tools, cartridge cleaners, sand filter media, and replacement parts. Pair with a pressure gauge to stay ahead of clogs.
Final Tip: A clean filter saves energy, protects your pump, and keeps water sparkling. Mark cleaning dates on your calendar—consistency is key!