JKM1002 Features: * Highly effective stain remover * For best results: Use Jack"s Magic The Stain ID Kit to confirm that Stain Solution #2 best removes stain * Removes Copper and scale from pools up to 50,000 gallons * Replaces the need to drain and acid wash Options: * Available in 5 lb. and 10 lb sizes Specifications: * Part of Jack"s Magic Stain Program (Step 2 Removal) Disclaimer: * PLEASE NOTE: Pool heaters must be bypassed when using this product for stain removal