AquaStar Pipeline Cartridge Filter, 250 sq. ft | PLF35000 Calcium Hardness This O-ring seats between the

This O-ring seats between the strainer cover and the pump body

Unicel FS-2005

The strainer cover closes and seals the pump's strainer pot

If algae is still visible repeat dose (steps 3 & 4) as necessary until pool is free of visible algae

Sunbelt Spas

AquaStar Pipeline Cartridge Filter, 250 sq. ft | PLF35000 Calcium Hardness This O-ring seats between theMeet the AquaStar Pipeline Cartridge Filter PLF35000 that can turnover 96,000 gallons in 8 hours Residential or 33,750 in 6 hours for Commercial Public Pool. Made in the USA! Need a more economical model? Compare to the AquaStar PLF27000 200 sq ft model. Designed to deliver DE level clarity with the ease of a cartridge filter. NSF standards require filters to reduce turbidity by 70% within five turnovers. The Pipeline Filter does it in just onefive