Pool filter clogged

A clogged pool filter is often caused by debris like leaves, sunscreen residue, body oils, and microscopic algae—not supernatural forces. Cleaning pool filters properly is key: Sand filter maintenance requires backwashing until water runs clear and replacing sand every 5-7 years to prevent channeling. For cartridge filter cleaning, avoid high-pressure sprays; instead, soak pleats overnight in a gentle cleaner. DE filter troubleshooting involves backwashing first, then adding fresh diatomaceous earth (DE) powder—never to a dirty filter, or it clumps like cement. Common mistakes include ignoring pressure spikes (clean at +8-10 PSI), power-washing cartridges (which shreds pleats), or skipping deep cleans. Each filter type has quirks: sand is low-maintenance, cartridges trap tiny particles but need care, and DE offers ultra-clear water but demands precision. Regular upkeep prevents clogs, extends filter life, and keeps your pool crystal clear—no exorcism required.