# Natural Chemistry Pro Series Cal-Hypo Pool Shock 25 lb

**LOCAL DELIVERY OR IN-STORE PICKUP ONLY**

When pools demand consistent, high-output sanitation, small shock bags simply aren’t enough. The **Pro Series Cal Hypo Pool Shock 25LB – Natural Chemistry** is a professional-grade calcium hypochlorite [shock](https://benchmarkpoolsupply.com/collections/shocks "Fast Working Pool Shock") designed for pool owners, service companies, and facilities that need reliable chlorine performance at scale.

Formulated with **65% available calcium hypochlorite**, this bulk shock treatment delivers strong oxidation, effective algae control, and dependable sanitation without adding stabilizer to the water. It’s a trusted choice for maintaining clean, clear pool water in high-use environments where chemistry must stay predictable and efficient.

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### Professional-Grade Calcium Hypochlorite for Serious Pools

This **Pro Series cal hypo shock** is built for pools that experience heavy bather loads, warm temperatures, or frequent organic contamination. The high chlorine output aggressively oxidizes contaminants that consume free chlorine and lead to [cloudy water](https://benchmarkpoolsupply.com/collections/clarifiers "Pool Clarifiers Clear Water Fast") or [algae growth](https://benchmarkpoolsupply.com/collections/algaecides "Kill Algae With Pool Algaecides").

Used regularly, it helps:

-   Maintain proper sanitizer levels
    
-   Control algae before it becomes visible
    
-   Break down oils, sweat, sunscreen, and debris
    
-   Support consistent water clarity
    

It’s an essential product for keeping demanding pools under control.

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### No Stabilizer — Prevents Long-Term Chemistry Problems

Unlike stabilized chlorine products, **Natural Chemistry Pro Series Cal Hypo Shock contains no cyanuric acid (CYA)**. This is critical for long-term water balance, especially in pools already using stabilized tablets or granular chlorine.

By avoiding CYA buildup, this shock helps:

-   Preserve chlorine effectiveness
    
-   Prevent “chlorine lock”
    
-   Reduce the need for draining and refilling
    
-   Keep water chemistry manageable over time
    

It’s an ideal solution for pools where water replacement is costly or impractical.

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### Bulk 25LB Size for Efficiency and Cost Control

The **25-pound container** is designed for efficiency. Instead of constantly restocking small bags, this bulk format reduces downtime, lowers per-treatment cost, and simplifies chemical storage for ongoing maintenance.

This size is well suited for:

-   Pool service professionals
    
-   HOAs and community pools
    
-   Apartment complexes
    
-   Hotels and hospitality pools
    
-   Large residential pools
    

For anyone managing more than a single backyard pool, bulk shock just makes sense.

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### Fast-Dissolving Granules for Effective Treatment

The fast-dissolving granular formula allows chlorine to disperse quickly when applied correctly, delivering rapid oxidation without prolonged cloudiness. When used according to label directions, it provides strong performance with predictable results.

This makes it effective for:

-   Routine shocking
    
-   Algae prevention programs
    
-   Recovery after heavy pool use
    
-   Post-storm or contamination treatment
    

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### Product Specifications

**Specification**

**Details**

Brand

Natural Chemistry

Product Name

Pro Series Cal Hypo Pool Shock

Chemical Type

Calcium Hypochlorite (Cal Hypo)

Available Chlorine

65%

Form

Granular

Package Size

25 lb

Pool Type

Inground and above-ground pools

Stabilizer Content

None (no cyanuric acid)

Primary Use

Shock treatment, sanitation, algae control

Application

Commercial & large residential pools

SKU

20602PRO

UPC

810032580315

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### Why Pool Professionals Choose Pro Series Cal Hypo

-   Bulk 25LB size for high-demand pools
    
-   65% available chlorine for reliable oxidation
    
-   No stabilizer to prevent CYA buildup
    
-   Effective algae and bacteria control
    
-   Trusted Natural Chemistry formulation
    
-   Cost-efficient solution for ongoing maintenance
    

For pools that require consistent performance without chemistry headaches, this pro-grade shock delivers dependable results.

* * *

### Buy with Confidence from Benchmark Pool Supply

When you purchase **Pro Series Cal Hypo Pool Shock – Natural Chemistry** from Benchmark Pool Supply, you’re buying from pool professionals who understand large-scale water care and real-world pool conditions.

We stock trusted commercial-grade [chemicals](https://benchmarkpoolsupply.com/collections/pool-chemicals "Pool Chemicals For Proper Water Balance") and support our customers with knowledgeable guidance to help keep pools clean, clear, and balanced.

## Details

- **Price:** 139.95 USD
- **Vendor:** Natural Chemistry
- **Type:** Shocks & Oxidizers
- **Tags:** quote-only, Ready for Links, SEO Added

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 139.95 USD | In stock |

## Images

- Natural Chemistry Pro Series Cal-Hypo Pool Shock 25 lb bucket OEM pool chemical parts

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> Source: [Benchmark Pool Supply](https://benchmarkpoolsupply.com/products/products-natural-chemistry-cal-hypo-pool-shock-25lb)
> Updated: 2026-07-11