Item details: 

Feature:
A powerful chlorine shock will make your pool more powerful to remove pollutants and other pollutants that build up in your pool during the winter.
This product is copper-free and will not dye anyone's hair green.
The sun protection effect lasts longer. Instant, accurate custom testing for stain, rust, and scale resistance that removes unsightly stains caused by minerals, ideal for areas with high iron levels in water.
The applicator simply fills up with a chemical of your choice and floats in the pool. Ideal for use in above ground pools, hot tubs, spas and more.