Refresh+ 25 lbs 73% Calcium Hypochlorite Pool Shock
Product Overview
At 73% available strength, RE•FRESH + delivers heavy-hitting oxidation without driving cyanuric acid to unmanageable levels.
For routine superchlorination and persistent algae cleanups, EZ Pool RE•FRESH + utilizes high-potency 73% calcium hypochlorite to eliminate organic waste and restore water clarity rapidly. Packed in a 25 lbs pail, this fast-dissolving granular shock raises free chlorine immediately without adding stabilizer, making it a proven choice for maintaining balanced pool chemistry during peak summer heat.
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Benefits & What Makes It Different
73% Calcium Hypochlorite Strength
Delivers concentrated sanitizing power to quickly break down chloramines, organic bather waste, and algae blooms.
Unstabilized Formula
Contains zero cyanuric acid, preventing chlorine lock issues common with routine dichlor or trichlor shock treatments.
Economical 25 lbs Pail
Provides a reliable, bulk supply sized for recurring weekly maintenance and multi-step green water cleanups.
Product Details
Calcium Hypochlorite 73%
1 lb per 10,000 gallons for routine maintenance; 2–3 lbs per 10,000 gallons for algae remediation.
Compatibility
- Never pre-mix in a bucket or combine with trichlor, dichlor, or acids due to severe chemical reaction risk.
- Broadcast evenly across the deep end with the pump and filter running.
- Suitable for all properly balanced plaster, vinyl, fiberglass, and painted pool surfaces.
When To Use This
Pro Tip
Always test and balance your pH to 7.2–7.4 before broadcasting this shock. Cal-hypo naturally elevates water pH slightly upon application, and chlorine sanitizes far more effectively in slightly lower pH water.
Common Questions & Instructions
How much Refresh Plus pool shock do I add per 10,000 gallons?
For routine weekly maintenance, broadcast 1 lb of RE•FRESH + per 10,000 gallons of pool water to raise free chlorine by approximately 7 to 8 ppm. For heavy algae cleanup, dose 2 to 3 lbs per 10,000 gallons after brushing surfaces and adjusting pH to 7.2–7.6.
Does 73% calcium hypochlorite raise pool calcium hardness?
Yes, calcium hypochlorite adds approximately 0.8 ppm of calcium hardness for every 1 ppm of free chlorine added. In hard water areas, monitor your calcium levels regularly to keep pool water within the target range of 200–400 ppm.
How long should I wait to swim after applying Refresh pool shock?
Keep swimmers out of the water until your free chlorine level drops back into the safe range of 1–3 ppm, which generally takes 8 to 24 hours depending on sunlight exposure, water temperature, and initial organic load.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
