Owning a swimming pool brings endless summer fun, but murky water can ruin the experience fast. Many homeowners underestimate how much their filter choice affects water clarity, chemical balance, and weekly chores. Choosing the wrong system leads to algae blooms, cloudy water, and expensive repairs.
Frequently Asked Questions
How often should I clean my pool filter?
Cartridge filters need cleaning every two to four weeks during peak swimming season. Sand filters require backwashing when the pressure gauge rises 8 to 10 PSI above the clean operating level. DE filters should be backwashed when pressure increases by the same amount, with fresh DE powder added after each backwash.
Can I use a sand filter for an above-ground pool?
Yes, sand filters work well for above-ground pools. The Doheny’s Sand Filter System is designed specifically for above-ground setups and handles medium debris loads effectively. Sand filters are particularly good for pools that collect leaves and larger organic matter.
What size pool filter do I need for a 15,000-gallon pool?
A filter with a flow rate of at least 31 GPM can turn over a 15,000-gallon pool in eight hours. Most medium-sized cartridge or sand filters meet this requirement. A filter with 100 to 120 square feet of filtration area provides adequate capacity with reasonable cleaning intervals.
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Is a DE filter worth the extra cost?
DE filters provide the finest filtration available, capturing particles down to 2 microns. If you struggle with persistent cloudiness, algae issues, or fine debris that other filters miss, the investment is justified. For pools with minimal debris and clear water, a good cartridge filter may be sufficient at a lower cost.
How long does a pool filter cartridge last?
Most cartridges last one to two seasons before replacement is needed. Frequent cleaning extends their life, but eventually the pleated material degrades and loses its ability to trap particles. Signs of a worn cartridge include tears in the fabric, persistent pressure drops, or cloudy water despite regular cleaning.
Choosing the right pool filter comes down to matching the system to your specific pool size, debris type, maintenance preferences, and budget. A cartridge filter offers simplicity and low upkeep. Sand filters handle large debris with minimal consumable costs. DE filters deliver unmatched clarity for those willing to invest more time and money. Whichever type you select, proper sizing and regular care will keep your pool inviting all season long.
