Natural Chemistry Pool Magic + PHOSfree Spring & Fall Purifier – 1 Liter (ltr)/33.9 Ounce (oz)

Closing pools for the season with this blend of Pool Magic and PHOSfree will mean a smooth opening in the spring – No waterline ring, and no hassle! Normal sanitizer levels will prevent algae growth. Keeps phosphates low in off season. Ideal Spring startup.

• 1L/33.9oz treats 25,000 gallons