Why Your Pool Pump Isn’t the Problem — Your Filter Is
Most pool owners assume the pump does the heavy lifting, but a right-sized filter is the real backbone of a clean, easy-to-maintain pool. The filter doesn’t just trap dirt; it drives circulation, which keeps water moving through skimmers, cleaners, and returns. That movement prevents dead spots where algae thrive and reduces the runtime needed to maintain clarity. When a filter is undersized, pressure rises faster, flow stalls, and you end up cleaning incessantly even if the pump is powerful. A larger filter lowers resistance, keeps PSI stable longer, and maintains consistent flow that makes every other piece of equipment work better, including modest pumps. Consider how filter surface area changes the job. A 100 square foot cartridge on a 15,000-gallon pool will clog quickly, pushing PSI up and starving circulation, which forces you to clean monthly. Jump to 400 square feet and you spread the load across four cartridges; cleaning often drops to every four to six months, and water stay...