In Store Only Kill 99.9% of Organic Contaminants. Removes bacteria and calcium build-up in hot tub pipes. Treats hot tubs of up to 2,000L. Contents: No. 1 | 170g (Dichloroisocyanuric acid) No. 2 | 700g (Sodium bisulfate) No. 3 | 340g (Sodium carbonate) Directions for use: Remove the head rests (cartridges can remain in the hot tub during the process). Sprinkle the entire content of No. 1 followed by No. 2. Soak the product for 4 hours while activating the pumps through multiple cycles. After the 4-hour wait, pour the content of No. 3 and active the pumps for 15 minutes. Drain. Rinse the cartridges and refill with fresh water.
