Pool & Spa Filter Guides
How to clean, measure and replace pool and hot tub filter cartridges, and how sand, cartridge and DE filters compare.
How to clean a pool filter cartridgeHow and when to clean a pool or hot tub filter cartridge: rinsing, soaking, degreasing and acid washing, and the mistakes that shorten cart…
When to replace a pool filter cartridgeHow long pool and spa filter cartridges last and the signs it’s time to replace yours: torn or flattened pleats, cracked end caps, short cy…
Sand vs cartridge vs DE filtersSand, cartridge and DE pool filters compared: filtration fineness, maintenance, water use, cost and which suits your pool.
Pool filter sizesHow to measure a pool or spa filter cartridge (length, outside diameter and top/bottom openings) and why sq ft alone isn’t enough to find a…
Hot tub filter replacementHow to find the right replacement hot tub filter, how often to replace it, how to measure it, and how to keep spa filters clean.
Pleatco vs Unicel vs FilburHow the three big aftermarket pool filter cartridge brands compare, how their part numbers work, and how to cross-reference them to your fi…