BioGuard Basic Shock

Add 1 lb per 12,000 gallons of water.

Test chlorine level prior to Re-Entry. Re-Entry into treated swimming pools is prohibited above levels of 4 ppm chlorine due to risk of bodily injury.

To Shock Water:

• Add 1 lb per 12,000 gallons of water into the deepest pool area while filter and pump are not operating.
• DO NOT pre-dissolve, DO NOT apply through skimmer or chemical feeder, DO NOT mix with other chemicals; a violent reaction may result.
• Wait at least 15 minutes after product application before entering pool.
• To prevent damage to pool surface, use an appropriate pool brush to disperse any undissolved granules which may have settled to the bottom of the pool.
• Operate pump and filter continuously for 4 to 8 hours after product addition.
• Apply more product after heavy use, high temperatures, or rain. For best results, shock pool weekly.

To Kill Algae:

• Brush pool surfaces while filter and pump are operating.
• Add 1 lb per 12,000 gallons directly to the pool water in areas of heaviest algae growth, operate filter and pump for 24 hours.
• Repeat brushing.
• Do not enter the pool until the free available chlorine residual is 1-4 ppm.
• Product can be reapplied after 72 hours if necessary.

To Close Pool:

• Backwash filter following manufacturer's directions.
• Apply this product at a rate of 1 lb per 6,000 gallons into the deepest pool area while filter and pump are operating.
• To prevent damage to pool surface, use an appropriate pool brush to disperse any undissolved granules which may have settled to the bottom of the pool.
• Apply appropriate winter algaecide after application of this product.

Trichloro-s-triazinetrione: 43.47%, Other Ingredients: 56.53%