Overview Keep your large residential pool crystal clear all summer with the Poolzilla replacement filter cartridge for the Hayward C1200. With 120 square feet of pleated polyester filtration media, this oversized cartridge captures dirt, pollen, sunscreen residue, and ultra-fine debris — meaning longer stretches between cleanings and noticeably clearer water on every swim day. Measuring 23.25 inches tall with an 8.9375-inch outer diameter and a 4-inch open top, it's precision-built to drop right into your existing Hayward filter housing without shims, adapters, or modifications. The reinforced molded end caps create a leak-proof seal that prevents dirty water from sneaking past the pleats, and the generous surface area takes pressure off your pump so it runs cooler, quieter, and more efficiently. More dirt capacity means less maintenance for you — and more time enjoying your backyard. For best results, plan to rinse the cartridge every four to six weeks throughout swim season and replace it once a year — or sooner if your pump pressure climbs 8–10 PSI above its normal reading, or if your water looks cloudy even after balancing your chemicals. A tired filter doesn't just dull your water; it forces your pump to work overtime, drives up chemical use, and shortens the life of your equipment. Swapping in a fresh Poolzilla cartridge takes about five minutes: power off the pump, open the filter housing, lift out the old cartridge, drop in the new one, and you're back in business. Order yours before pool season hits full swing so your family can dive into clean, sparkling water from the very first warm weekend. What's Included Your order includes the selected quantity of replacement pool filter cartridges. Each unit is individually inspected for quality before shipping.
