Leslies Power Powder Plus Calcium Hypochlorite Pool Shock

Leslie’s Power Powder Plus, containing 73% Calcium Hypochlorite, is the best pool shock to combat algae blooms. Excellent for both treatment and regular maintenance, it keeps pool water safe by eliminating contaminants.

Product Description

When you have an algae bloom or need to treat other pool problems, look no further than Leslie’s Power Powder Plus Cal-Hypo Pool Shock. With 73% Calcium Hypochlorite active ingredient and a minimum of 70% available chlorine, it’s the strongest pool shock available. Power Powder Plus is known as a solution shock as it destroys algae blooms and organic as well as inorganic contaminants. Power Powder Plus Calcium Hypochlorite Pool Shock is also great for weekly maintenance to super chlorinate and give your chlorine levels a quick boost when you need it. Whether you’re using Power Powder Plus as a treatment or maintenance pool shock, it’s extremely effective at keeping pool water sanitized and safe for swimming.


Usage Directions for Swimming Pools:

  • Add the recommended dosage of Leslie’s Power Powder Plus during the evening hours while the filter pump is running.
  • When adding to your pool, broadcast evenly over a wide area in the deepest part of the pool. Use a clean, dry scoop to measure this product. Do not use the scoop for any other purpose. If any granules settle to the bottom of the pool, use a brush to disperse.

Superchlorination Usage Directions for Swimming Pools:

  • Every 7 days, or as necessary to prevent pool problems, shock treat/super chlorinate the pool by adding 9-18 ounces of Leslie’s Power Powder Plus Cal-Hypo Pool Shock per 10,000 gallons of pool water to provide 5-10 ppm available chlorine.
  • Additional shock treatments may be required to correct problems which are caused by visible algae growth, high bathing loads, heavy wind, rainstorms, unpleasant odors, and eye irritation. Check the available chlorine level with a suitable test kit.
  • To prevent possible staining or bleaching, take the following steps immediately after treatment: Thoroughly clean the pool by brushing the surface of algae growth, vacuum, and cycle through the filter.
  • Re-entry into treated pools is prohibited above 4 ppm due to risk of bodily harm


9-18 oz. per 10,000 gallons provides 5-10 ppm available chlorine


Calcium Hypochlorite: 73%