PHOSfloc is a high-grade, iron-free floc that dissolves instantly in water. Used as directed, it reduces high phosphate levels in a pool to well under 1,000ppb. Then you can reduce phosphates to near zero levels using Natural Chemistry's PHOSfree.

• Reduces phosphate levels over 2500 ppb to more manageable levels
• Non-toxic and will not harm the environment
• Must be vacuumed to waste