Clear Answers on
Pool Filter Maintenance
Whether you have a sand filter, cartridge filter, or DE filter — we cover how to clean it, when to replace it, and which products are actually worth buying.
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What Type of Filter Do You Have?
Choose your filter type to find the right guides and maintenance advice.
Sand Filters
8 guidesHow to change sand, how much you need, troubleshooting cloudy water, and which brand to buy.
Browse guides →Cartridge Filters
5 guidesCleaning schedules, when to replace, chemical soak vs hose rinse, and the best cartridges.
Browse guides →DE Filters
4 guidesHow diatomaceous earth filters work, full grid cleaning walkthrough, and recharging DE powder.
Browse guides →Most Read
Popular Guides
The questions pool owners search most — answered in full.
How to Backwash a Pool Filter
Step-by-step for sand and DE filters, including Hayward and Pentair.
Read guide →How to Change Pool Filter Sand
Includes how much sand you need by filter size and model.
Read guide →How Much DE for Pool Filter?
First charge vs recharge amounts - sizing table by filter model.
Read guide →How Often to Backwash Pool Filter
The PSI rule explained - not the calendar rule.
Read guide →How to Clean Pool Cartridge Filter
The right cleaning method - chemical soak vs hose rinse.
Read guide →How Long Should a Pool Filter Run?
The turnover rate formula, per-gallon guide, and seasonal adjustments.
Read guide →Our Standards
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Hands-On Testing
We own and use the products we review. Every how-to guide is written from direct, first-hand experience — not manufacturer copy or spec sheets.
Data-Backed Advice
Maintenance schedules and water chemistry guidelines are cross-referenced with NSPF standards and published pool industry research.
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