Phosfree Extra Strength Large - 32"-38"

Large - 32"-38"

Pair with Sirona™ Defend to prevent scale formation in spa and hot tub water

or if an algae bloom occurs

20 gpm max

Four tread unit is for above ground pools

Phosfree Extra Strength Large - 32"-38"Phosfree Extra Strength quickly gives you back control over pool by removing phosphates. Phosphates can get into your pool from other pool chemicals, fertilizers, sweat, and many other sources and wreak havoc on your pool. Simply add Phos Free to your pool skimmer and its unique formula coats your pool filter, which then traps and removes phosphates quickly. Best of all, PHOS Free Extra Strength is unconditionally guaranteed by Natural Chemistry to