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Power Powder Plus 73% Calcium Hypochlorite Pool Shock - 25 Lb
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Power Powder Plus 73 is a concentrated granular calcium hypochlorite pool shock for swimming pool treatment and routine maintenance. It is formulated to kill bacteria, control algae, and destroy organic contaminants.
The fast-dissolving, low-residue, non-stabilized formula contains no cyanuric acid (CyA). Use during evening hours while the filter pump is running.
- Active Ingredient: 73% Calcium Hypochlorite
- Minimum Available Chlorine: 70%
- Chemical Type: Shock
- Container Size: 25 lb
- Dosage: 9-18 oz. per 10.000 gallons provides 5-10 ppm available chlorine
- Product Dimensions: 11.3 in Width x 13 in Length x 10.3 in Height
- Product Weight: 25 lbs
Shipping
Last updated: September 9, 2026
CALVIRELLE currently ships to the 48 contiguous United States and Washington, DC.
We do not currently ship to Alaska, Hawaii, Puerto Rico, other U.S. territories, APO/FPO/DPO addresses, or international destinations.
1. Order Processing
Orders are normally processed within 1–2 business days.
Business days are Monday through Friday and exclude weekends and U.S. federal holidays. Orders placed outside business hours begin processing on the next business day.
Processing time is separate from carrier transit time.
2. Shipping Rates
Standard shipping rates are:
• Orders under $50:... Read full policy
Returns & refunds
Last updated: September 9, 2026
At CALVIRELLE, we want you to feel confident about your purchase. We accept eligible returns and exchanges, including returns due to a change of mind, within 30 days after the order is delivered.
1. Return Eligibility
To qualify for a return or exchange, an item must be:
• Unworn and unused
• Unwashed and free from stains, odors, makeup, pet hair, or other signs of wear
• In its original condition
• Returned with all original tags, labels, packaging, and accessories
Customers may carefully try on clothing indoors... Read full policy