Ultra-fine replacement filter basket for Dolphin robot pool cleaners that captures finer debris for cleaner water. Key benefits Compatibility: Designed to fit Dolphin robot pool cleaners including Active 20, E30 S300, M600/Triton-PS, making it a direct replacement for these models. Superior filtration: Ultra-fine filter paper traps sand, silt, and leaves more effectively than traditional fabric filters, reducing visible debris and improving water clarity. Durable construction: Rigid ABS plastic frame provides stability and resists breakage for reliable, long-lasting performance. Easy maintenance: Rinse clean with a garden hose for fast reuse; quick maintenance keeps your cleaner working without special tools or chemicals. Practical performance: Balances fine particle capture with good water flow so your robot maintains cleaning efficiency while removing more dirt. Typical applications Weekly residential pool maintenance: Ideal for backyard pools exposed to fine dust and general debris to keep weekly cleanings more effective. After storms or high winds: Captures increased leaf and sand load that accumulates after weather events, reducing time spent skimming and backwashing. Pools near trees or sandy areas: Useful where leaves, twigs, and sand regularly enter the pool, improving routine cleanup and water clarity. What you get An ultra-fine filter basket with an ABS plastic frame engineered to fit the listed Dolphin models and improve debris capture while being easy to clean and reuse.