Natural Chemistry Pro Series Dual-Action Algaecide Size:1 gal scum lines and other problems

scum lines and other problems caused by contaminants in your pool or spa

Arctic Blue Shock is made right here in the USA to ensure the highest quality

It effectively breaks down iron buildup on pool surfaces within 2 to 7 days

and will not add chlorine to the water

these test strips offer a fast and reliable way to check three critical water parameters: Total Hardness

Natural Chemistry Pro Series Dual-Action Algaecide Size:1 gal scum lines and other problemsThe Natural Chemistry Pro Series Dual Action Algaecide is a fast acting algae remover that is highly effective. This liquid formula will kill all forms of algae including green, black, and mustard algae. It is formulated to be compatible with most pool sanitizers. See results in your pool with no foaming in just 24 hours, and it can be applied to pools with connected spas or jetted returns.