100% industrial ascorbic acid quickly removes stubborn metal stains from swimming pools.
	
Removes metal staining on pool liners and finishes - works great on steps, too!
	
Use with Natural Chemistry’s Metal Free for the ultimate 1-2 combination for stain fighting.
	
Stain Free Extra-Strength is a premium stain fighter that removes metal staining without adding phosphates to your pool water.
	
100% compatible with all sanitizing systems.