Bottom line: match the pore size to the debris
Ultra-fine and NanoFilter™ media are intended for smaller settled particles such as pollen, dust, and fine dirt. They may improve collection when coarse screens let material pass, but cloudy water can also come from chemistry or circulation problems that a robot cannot correct.
Verify the filter configuration
Current packages for the Quantum, Premier, Sigma, and Cayman can differ in which media is included or supported. “Ultra-fine,” “NanoFilter™,” and model-family names do not by themselves guarantee fit. Check the current listing, manual, and replacement-media part number for the exact cleaner.
Coarse and fine media have different jobs
When the cleaner supports multiple media types, coarse screens or leaf-focused media are better suited to bulk leaves; fine pleats are better suited to sediment and settled dead algae after chemistry treatment. Removing bulk debris before a fine-filter cycle can reduce clogging.
Maintenance determines useful flow
Rinse the media before debris becomes packed into the pleats, inspect it for damage, and reinstall it evenly. Also make sure the cleaner's pool dimensions, surface guidance, and cleaning zones—fine filtration does not make an otherwise incompatible robot fit the pool.
